{
"query": {
"display": "$$3x^{2}+5x-k\\left(x\\right)=0$$",
"symbolab_question": "CONIC#3x^{2}+5x-k(x)=0"
},
"solution": {
"level": "PERFORMED",
"subject": "Geometry",
"topic": "Parabola",
"subTopic": "formula",
"default": "(h,k)=(-\\frac{5}{6},-\\frac{25}{12}),p=\\frac{1}{12}"
},
"steps": {
"type": "interim",
"title": "$$3x^{2}+5x-y=0:\\quad$$Parabola with vertex at $$\\left(h,\\:k\\right)=\\left(-\\frac{5}{6},\\:-\\frac{25}{12}\\right),\\:$$and focal length $$|p|=\\frac{1}{12}$$",
"input": "3x^{2}+5x-y=0",
"steps": [
{
"type": "definition",
"title": "Parabola standard equation",
"text": "$$4p\\left(y-k\\right)=\\left(x-h\\right)^{2}\\:$$ is the standard equation for an up-down facing parabola with vertex at $$\\left(h,\\:k\\right),\\:$$<br/>and a focal length $$|p|$$"
},
{
"type": "interim",
"title": "Rewrite $$3x^{2}+5x-y=0\\:$$in the standard form",
"input": "3x^{2}+5x-y=0",
"steps": [
{
"type": "step",
"primary": "Rewrite as",
"result": "y=3x^{2}+5x"
},
{
"type": "interim",
"title": "Complete the square $$3x^{2}+5x:{\\quad}3\\left(x+\\frac{5}{6}\\right)^{2}-\\frac{25}{12}$$",
"input": "3x^{2}+5x",
"steps": [
{
"type": "step",
"primary": "Write $$3x^{2}+5x\\:$$in the form: $$x^2+2ax+a^2$$",
"secondary": [
"Factor out $$3$$"
],
"result": "3\\left(x^{2}+\\frac{5x}{3}\\right)"
},
{
"type": "interim",
"title": "$$2a=\\frac{5}{3}{\\quad:\\quad}a=\\frac{5}{6}$$",
"input": "2a=\\frac{5}{3}",
"steps": [
{
"type": "interim",
"title": "Divide both sides by $$2$$",
"input": "2a=\\frac{5}{3}",
"result": "a=\\frac{5}{6}",
"steps": [
{
"type": "step",
"primary": "Divide both sides by $$2$$",
"result": "\\frac{2a}{2}=\\frac{\\frac{5}{3}}{2}"
},
{
"type": "interim",
"title": "Simplify",
"input": "\\frac{2a}{2}=\\frac{\\frac{5}{3}}{2}",
"result": "a=\\frac{5}{6}",
"steps": [
{
"type": "interim",
"title": "Simplify $$\\frac{2a}{2}:{\\quad}a$$",
"input": "\\frac{2a}{2}",
"steps": [
{
"type": "step",
"primary": "Divide the numbers: $$\\frac{2}{2}=1$$",
"result": "=a"
}
],
"meta": {
"solvingClass": "Solver",
"interimType": "Generic Simplify Specific 1Eq",
"gptData": "pG0PljGlka7rWtIVHz2xymbOTBTIQkBEGSNjyYYsjjDErT97kX84sZPuiUzCW6s7n/9TIosDfOyZXH4usT9jsy061ljBSPJeENOw2efoSWuFFDuzzgIzA1F36c+SAFGgRSpN33oxZMojoqvYhvSJACLkpiVA7S8UT8ieezZKu6pQyGeXuoJHAaVrX92ZjOTT"
}
},
{
"type": "interim",
"title": "Simplify $$\\frac{\\frac{5}{3}}{2}:{\\quad}\\frac{5}{6}$$",
"input": "\\frac{\\frac{5}{3}}{2}",
"steps": [
{
"type": "step",
"primary": "Apply the fraction rule: $$\\frac{\\frac{b}{c}}{a}=\\frac{b}{c\\:\\cdot\\:a}$$",
"result": "=\\frac{5}{3\\cdot\\:2}"
},
{
"type": "step",
"primary": "Multiply the numbers: $$3\\cdot\\:2=6$$",
"result": "=\\frac{5}{6}"
}
],
"meta": {
"solvingClass": "Solver",
"interimType": "Generic Simplify Specific 1Eq",
"gptData": "pG0PljGlka7rWtIVHz2xymbOTBTIQkBEGSNjyYYsjjDErT97kX84sZPuiUzCW6s7tiTmKkmeEqHWILbBb88ajdOhMiTfGswczRF8hIUIlWMDnzlbPZjyKgy1eUCFsLd5YSjT6Of+O++tJijO/Dvck6vKzRUWvR7H7TI+qhAXIp0eKYFFhGodJZ4mS5Q+F9MLRBHnX1v95RIc5nuXPcUCVzQJlT9qiZDPdH9NYNoNRIs="
}
},
{
"type": "step",
"result": "a=\\frac{5}{6}"
}
],
"meta": {
"interimType": "Generic Simplify 0Eq"
}
}
],
"meta": {
"interimType": "Divide Both Sides Specific 1Eq",
"gptData": "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"
}
}
],
"meta": {
"solvingClass": "Equations",
"interimType": "Equations"
}
},
{
"type": "step",
"primary": "Add and subtract $$\\left(\\frac{5}{6}\\right)^{2}\\:$$",
"result": "3\\left(x^{2}+\\frac{5x}{3}+\\left(\\frac{5}{6}\\right)^{2}-\\left(\\frac{5}{6}\\right)^{2}\\right)"
},
{
"type": "step",
"primary": "$$x^2+2ax+a^2=\\left(x+a\\right)^2$$",
"secondary": [
"$$x^{2}+\\frac{5}{3}x+\\left(\\frac{5}{6}\\right)^{2}=\\left(x+\\frac{5}{6}\\right)^{2}$$",
"Complete the square"
],
"result": "3\\left(\\left(x+\\frac{5}{6}\\right)^{2}-\\left(\\frac{5}{6}\\right)^{2}\\right)"
},
{
"type": "step",
"primary": "Simplify",
"result": "3\\left(x+\\frac{5}{6}\\right)^{2}-\\frac{25}{12}"
}
],
"meta": {
"solvingClass": "Equations",
"interimType": "Complete Square 1Eq"
}
},
{
"type": "step",
"result": "y=3\\left(x+\\frac{5}{6}\\right)^{2}-\\frac{25}{12}"
},
{
"type": "step",
"primary": "Add $$\\frac{25}{12}$$ to both sides",
"result": "y+\\frac{25}{12}=3\\left(x+\\frac{5}{6}\\right)^{2}"
},
{
"type": "step",
"primary": "Divide by coefficient of square terms: $$3$$",
"result": "\\frac{1}{3}\\left(y+\\frac{25}{12}\\right)=\\left(x+\\frac{5}{6}\\right)^{2}"
},
{
"type": "step",
"primary": "Rewrite in standard form",
"result": "4\\cdot\\:\\frac{1}{12}\\left(y-\\left(-\\frac{25}{12}\\right)\\right)=\\left(x-\\left(-\\frac{5}{6}\\right)\\right)^{2}"
}
],
"meta": {
"interimType": "Parabola Canonical Format 1Eq"
}
},
{
"type": "step",
"result": "4\\cdot\\:\\frac{1}{12}\\left(y-\\left(-\\frac{25}{12}\\right)\\right)=\\left(x-\\left(-\\frac{5}{6}\\right)\\right)^{2}"
},
{
"type": "step",
"primary": "Therefore parabola properties are:",
"result": "\\left(h,\\:k\\right)=\\left(-\\frac{5}{6},\\:-\\frac{25}{12}\\right),\\:p=\\frac{1}{12}"
}
],
"meta": {
"solvingClass": "Parabola"
}
},
"plot_output": {
"meta": {
"plotInfo": {
"variable": "x",
"funcsToDraw": {
"funcs": [
{
"evalFormula": "y=\\frac{(x-(-\\frac{5}{6}))^{2}}{4\\frac{1}{12}}-\\frac{25}{12}",
"displayFormula": "4\\frac{1}{12}(y-(-\\frac{25}{12}))=(x-(-\\frac{5}{6}))^{2}",
"attributes": {
"color": "PURPLE",
"lineType": "NORMAL",
"isAsymptote": false
}
},
{
"evalFormula": "y=-\\frac{13}{6}",
"displayFormula": "y=-\\frac{13}{6}",
"attributes": {
"color": "GRAY",
"lineType": "NORMAL",
"labels": [
"\\mathrm{directrix}"
],
"isAsymptote": false
}
}
]
},
"pointsToDraw": {
"pointsLatex": [
"(-\\frac{5}{6},-\\frac{25}{12})",
"(-\\frac{5}{6},-2)"
],
"pointsDecimal": [
{
"fst": -0.8333333333333334,
"snd": -2.0833333333333335
},
{
"fst": -0.8333333333333334,
"snd": -2
}
],
"attributes": [
{
"color": "PURPLE",
"labels": [
"\\mathrm{vertex}"
],
"labelTypes": [
"DEFAULT"
],
"labelColors": [
"PURPLE"
]
},
{
"color": "PURPLE",
"labels": [
"\\mathrm{focus}"
],
"labelTypes": [
"DEFAULT"
],
"labelColors": [
"PURPLE"
]
}
]
},
"functionChanges": [
{
"origFormulaLatex": [],
"finalFormulaLatex": [],
"plotTitle": "4\\cdot \\frac{1}{12}(y-(-\\frac{25}{12}))=(x-(-\\frac{5}{6}))^{2}",
"paramsLatex": [],
"paramsReplacementsLatex": []
}
],
"localBoundingBox": {
"xMin": -2.2261904761904763,
"xMax": 1.2261904761904765,
"yMin": -2.7619047619047623,
"yMax": 0.6904761904761907
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},
"showViewLarger": true
}
}
}
Solution
Solution
Solution steps
Rewrite in the standard form
Therefore parabola properties are:
Graph
Popular Examples
Frequently Asked Questions (FAQ)
What is 3x^2+5x-k(x)=0 ?
The solution to 3x^2+5x-k(x)=0 is Parabola with (h,k)=(-5/6 ,-25/12),p= 1/12