vertices y=(x+3)(x-3)

{ "query": { "display": "vertices $$y=\\left(x+3\\right)\\left(x-3\\right)$$", "symbolab_question": "CONIC#vertices y=(x+3)(x-3)" }, "solution": { "level": "PERFORMED", "subject": "Geometry", "topic": "Parabola", "subTopic": "vertices", "default": "\\mathrm{Minimum}\\:(0,-9)", "meta": { "showVerify": true } }, "methods": [ { "method": "Find vertex using averaging the zeros", "query": { "display": "vertex zeros $$y=\\left(x+3\\right)\\left(x-3\\right)$$", "symbolab_question": "vertexzeros y=(x+3)(x-3)" } }, { "method": "Find vertex using polynomial form", "query": { "display": "vertex quadratic $$y=\\left(x+3\\right)\\left(x-3\\right)$$", "symbolab_question": "vertexquadratic y=(x+3)(x-3)" } }, { "method": "Find vertex using parabola form", "query": { "display": "vertex parabola $$y=\\left(x+3\\right)\\left(x-3\\right)$$", "symbolab_question": "vertexparabola y=(x+3)(x-3)" } }, { "method": "Find vertex using vertex form", "query": { "display": "vertex form $$y=\\left(x+3\\right)\\left(x-3\\right)$$", "symbolab_question": "vertexform y=(x+3)(x-3)" } } ], "steps": { "type": "interim", "title": "Parabola vertex given $$y=\\left(x+3\\right)\\left(x-3\\right):{\\quad}$$Minimum $$\\left(0,\\:-9\\right)$$", "input": "y=\\left(x+3\\right)\\left(x-3\\right)", "steps": [ { "type": "definition", "title": "Parabola equation in factored form", "text": "The vertex of an up-down facing parabola of the form $$y=a\\left(x-m\\right)\\left(x-n\\right)\\:$$is the average of the zeros $$x_{v}=\\frac{m+n}{2}$$" }, { "type": "step", "result": "y=\\left(x+3\\right)\\left(x-3\\right)" }, { "type": "step", "primary": "The parabola parameters are:", "result": "a=1,\\:m=-3,\\:n=3" }, { "type": "step", "primary": "$$x_{v}=\\frac{m+n}{2}$$", "result": "x_{v}=\\frac{\\left(-3\\right)+3}{2}" }, { "type": "step", "primary": "Simplify", "result": "x_{v}=0" }, { "type": "interim", "title": "Plug in $$x_{v}=0\\:$$to find the $$y_{v}\\:$$value", "input": "y_{v}=\\left(0+3\\right)\\left(0-3\\right)", "result": "y_{v}=-9", "steps": [ { "type": "step", "primary": "Simplify", "result": "y_{v}=-9" } ], "meta": { "interimType": "Plug In Value 2Eq" } }, { "type": "step", "primary": "Therefore the parabola vertex is", "result": "\\left(0,\\:-9\\right)" }, { "type": "step", "primary": "If $$a<0,\\:$$then the vertex is a maximum value<br/>If $$a>0,\\:$$then the vertex is a minimum value<br/>$$a=1$$", "result": "\\mathrm{Minimum}\\:\\left(0,\\:-9\\right)" } ], "meta": { "solvingClass": "Parabola" } }, "plot_output": { "meta": { "plotInfo": { "variable": "x", "funcsToDraw": { "funcs": [ { "evalFormula": "y=\\frac{x^{2}}{4\\frac{1}{4}}-9", "displayFormula": "4\\frac{1}{4}(y-(-9))=x^{2}", "attributes": { "color": "PURPLE", "lineType": "NORMAL", "isAsymptote": false } }, { "evalFormula": "y=-\\frac{37}{4}", "displayFormula": "y=-\\frac{37}{4}", "attributes": { "color": "GRAY", "lineType": "NORMAL", "labels": [ "\\mathrm{directrix}" ], "isAsymptote": false } } ] }, "pointsToDraw": { "pointsLatex": [ "(0,-9)", "(0,-\\frac{35}{4})" ], "pointsDecimal": [ { "fst": 0, "snd": -9 }, { "fst": 0, "snd": -8.75 } ], "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}{4}(y-(-9))=x^{2}", "paramsLatex": [], "paramsReplacementsLatex": [] } ], "localBoundingBox": { "xMin": -7.142857142857143, "xMax": 7.142857142857143, "yMin": -11.428571428571429, "yMax": 2.8571428571428577 } }, "showViewLarger": true } }, "meta": { "showVerify": true } }