Question

Solve the equation.

4x2 – 8 = 56

Answer 1

4x2-8=56+8

Answer 2

4x=64

Answer 3

x=16

Answer 4

Just to be clear, is the question\[4x^2-8=56\]?

Answer 5

If it is\[4x^2-8=56\]Add 8 to both sides\[4x^2-8+8=56+8\]\[4x^2+0=64\]\[4x^2=64\]Divide both sides by 4\[\frac{4x^2}{4}=\frac{64}{4}\]\[\frac{4}{4}x^2=16\]\[1x^2=16\]\[x^2=16\]Find the square root of both sides\[\sqrt{x^2}=\sqrt{16}\]\[x=4\]