Question

Solve the equation. Select all that apply.

x^2= 121
A
x = 11
B. x=21
C. X = 61
D. x=-11
E. X=-21

Answer 1

x=11

Explanation:

Answer 2

x = 11, x = -11

Explanation:

I know this is kind of late but the two previous answers were wrong.

We have x² = 121. To find x, we need to get rid of the exponent, and to do this, we can take the square root of both sides:

√x² = √121

x = √121

You might think that x = 11 but remember, x can be negative as well because you can square negative numbers. Basically, every real number has two square roots - a positive and a negative one. So, the answer isn't just x = 11, it's also x = -11 because (-11)² = 121 as well.