Question

what is the roots of y=2x^2-4​

Answer 1

x=positive and negative square root 2

You can first say y=0 since we arw finding the roots, leaving us with the equation 2x^2-4=0. Then, you can add 4 to both sides, leaving us with 2x^2=4, then we divide both sides by 2, leaving us with x^2=2