Answer:
see below
Explanation:
4x^2 – 1 = 15
Add 1 to each side using the addition property of equality
4x^2 -1+1 =15+1
4x^2 =16
Divide each side by 4 using the division property of equality
4x^2/4 =16/4
x^2 = 4
Take the square root of each side
sqrt(x^2)= ±sqrt(4) property of square roots
x = ±2