brownchiqk brownchiqk

08-03-2017
Mathematics

contestada

Solve the quadratic equation.

(x - 5)2 = 9

Respuesta :

texaschic101 texaschic101

08-03-2017

(x - 5)^2 = 9
(x - 5)(x - 5) = 9
x^2 - 10x + 25 = 9
x^2 - 10x + 25 - 9 = 0
x^2 - 10x + 16 = 0
(x - 8)(x - 2) = 0

x - 8 = 0
x = 8

x - 2 = 0
x = 2

solution : x = 8 and x = 2

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