Question

Solve the equation using square roots. x2 -9=0

Answer 1

Answer: x = 3, x= - 3

Explanation:

x^2 - 9 = 0

=> x^2 = 9

=> x = 3, x= - 3

Answer 2

x^2 - 9 = 0
x^2 = 9
x = 3

3^2 - 9 = 0
9 - 9 = 0
0 = 0

The answer is x = 3

Hope this helps =)