What are the solutions to the equation completesquare x^2+4x-9 ?

The solutions to the equation completesquare x^2+4x-9 are (x+2)^2-13

Find the zeros of completesquare x^2+4x-9

The zeros of completesquare x^2+4x-9 are (x+2)^2-13

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

complete the square

x^{2} + 4 x - 9

(x + 2)^{2} - 13

Solution steps

x^{2} + 4 x - 9

Write

x^{2} + 4 x - 9

in the form:

x^{2} + 2 a x + a^{2}

2 a = 4 : a = 2

Add and subtract

2^{2}

x^{2} + 4 x - 9 + 2^{2} - 2^{2}

x^{2} + 2 a x + a^{2} = (x + a)^{2}

x^{2} + 4 x + 2^{2} = (x + 2)^{2}

(x + 2)^{2} - 9 - 2^{2}

Simplify

(x + 2)^{2} - 13

x^{2} + 4 x - 8

- x^{2} + 72 x = - 216 - 7 x^{2}

- 5 x^{2} + x + 4 = 0

n^{2} + 7 n + 6 = 0

x (x + 1) = 5 x - 4

What are the solutions to the equation completesquare x^2+4x-9 ?
The solutions to the equation completesquare x^2+4x-9 are (x+2)^2-13
Find the zeros of completesquare x^2+4x-9
The zeros of completesquare x^2+4x-9 are (x+2)^2-13