Question

Solve the following quadratic equation by the square root property of equality.

2(x + 7)2 = 64

Answer 1

2(x+7)^2 = 64
1 divide both sides by 2
(x+7)^2= 32
2 root both sides
x+7 = 4 * sqrt2
x = 4*sqrt2 - 7

Answer 2

2(x+7)^2 = 64
2(x+7) = +8/-8

2(x+7) = (+8) 2(x+7) = (-8)
x+7 = (+4) x+7 = (-4)
x = (+4) - 7 x = (-4) - 7
x = -3 x = -11