Question

Solve for x.
8x^2 - 5 = 11

Answer 1

x = 1

8x^2 turns to 16x
Add five on each side of the equation, totaling 16.
16x = 16
x = 1

Answer 2

x = ±sqrt(2)

Explanation:

8x^2 - 5 = 11

Add 5 to each side

8x^2 - 5+5 = 11+5

8x^2 = 16

Divide each side by 8

8x^2 = 16/8

x^2 = 2

Take the square root of each side

sqrt(x^2) = ±sqrt(2)

x = ±sqrt(2)