Question

Solve the equation using square roots
x^2 - 55 = 26

Answer 1

x = 9, -9

Explanation:

x^2 - 55 = 26

x^2 = 81.

Now, you might think that x = 9, but don't be fooled. -9 squared is also equal to 81.

So, x = 9, -9

Answer 2

x = ±9

Explanation:

x² - 55 = 26

+55 + 55

x² = 81

x = √81

x = ± 9