What is the vertices X^2+2X-8 ?

The vertices X^2+2X-8 is Minimum (-1,-9)

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vertices X^2+2X-8

vertices

X^{2} + 2 X - 8

Minimum (- 1, - 9)

Solution steps

y = X^{2} + 2 X - 8

The parabola parameters are:

a = 1, b = 2, c = - 8

x_{v} = - \frac{b}{2 a}

X_{v} = - \frac{2}{2 \cdot 1}

Simplify

X_{v} = - 1

Plug in

X_{v} = - 1

to find the

y_{v}

value

y_{v} = - 9

Therefore the parabola vertex is

(- 1, - 9)

a < 0,

then the vertex is a maximum value

a > 0,

then the vertex is a minimum value

a = 1

Minimum (- 1, - 9)

f (x) = x^{2} - 4 x - 4

f (x) = 2 x^{2} + 6 x + 1

x^{2} + 10 x + 11

y = x^{2} + 2 x - 35

f (x) = (x - 5)^{2}