What are the solutions to the equation completesquare x^2+8x-9=0 ?

The solutions to the equation completesquare x^2+8x-9=0 are x=1,x=-9

Find the zeros of completesquare x^2+8x-9=0

The zeros of completesquare x^2+8x-9=0 are x=1,x=-9

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x^{2} + 8 x - 9 = 0

x = 1, x = - 9

Solution steps

x^{2} + 8 x - 9 = 0

Move

9

to the right side

x^{2} + 8 x = 9

Rewrite in the form

(x + a)^{2} = b

(x + 4)^{2} = 25

For

the solutions are

f (x) = a, - a

Solve

x + 4 = 25 : x = 1

Solve

x + 4 = - 25 : x = - 9

The solutions to the quadratic equation are:

x = 1, x = - 9

2 x^{2} + 20 x = 0

- 3 x^{2} + 2 x + 2 = 0

9 x^{2} + 54 x + 83 = 0

300 = - 0.5 x^{2} + 40 x - 300

x^{2} - \frac{5}{4} x - \frac{1}{4} = 0

What are the solutions to the equation completesquare x^2+8x-9=0 ?
The solutions to the equation completesquare x^2+8x-9=0 are x=1,x=-9
Find the zeros of completesquare x^2+8x-9=0
The zeros of completesquare x^2+8x-9=0 are x=1,x=-9