Question

X^2 - 9 = 16
Solve for x

Answer 1

5

Explanation:

`x^(2) -9=16\\ x^(2) =16+9\\√(x) ^(2) =\sqrt{25\\`

`√(25) = 5`

Answer 2

X = ±5

Explanation:

X^2 - 9 = 16

Add 9 to each side

X^2 - 9+9 = 16+9

X^2 = 25

Take the square root of each side

sqrt(X^2 ) =±sqrt(25)

X = ±5