Question

4x²-1=0

Answer 1

4x^2 = 1
x^2 = (1/4)
square root of both sides
x = 1/2

Answer 2

4x^2=1
divide by 4 both sides
take square root

Answer 3

4x^2 = 1
x^2 = (1/4)
square root of both sides
x ={-1/2,1/2}
Meaning there are 2 answers: x can be both positive and negative.
Think about why if you don't already know.