Question

Solve 4x2 = 28 by finding square roots

Answer 1

First divide both sides by 4. Then take the square root of both sides (don't forget about the plus/minus)


\[\Large 4x^2 = 28\]

\[\Large x^2 = \frac{28}{4}\]

\[\Large x^2 = 7\]

\[\Large x = \pm\sqrt{7}\]

\[\Large x = \sqrt{7} \ \text{ or } \ x = -\sqrt{7}\]

Answer 2

thanks