What are the solutions of the equation x^2-1=15

Answer: x = + 4 or - 4

Step-by-step explanation:

x² - 1 = 15

x² = 15 + 1

x² = 16

Therefore, to solve for x we take the square root of both side

√x² = + / -√16

x² = + / -4

so, x = + 4 or - 4