Question

Solve the following quadratic equations by extracting square roots. Answer the question that follow.

6. 4xsquared-225=0
7. 3hsquared-147=0
9. (K+7)squared=289
10. (2s-1)squared=225

Answer 1

6. 4x²-225=0
(2x)² -15² =0
(2x-15)(2x+15)=0
X=+or-2/15