Question

X^2 - 9 = 16
Solve for x

Answer 1

Answer:

X = ±5

Step-by-step 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

Answer 2

Answer:

5

Step-by-step explanation:

$x^{2} -9=16\\ x^{2} =16+9\\\sqrt{x} ^{2} =\sqrt{25$

$\sqrt{25} = 5$