4x2 – 1 = 15
find the justification

see below

Step-by-step 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

2? if not the correct answer you might need to provide more information

step-by-step explanation: