WAEC Mathematics past questions and answers

Simplify: √108+√125−√75 A √3+5√5 B 6√3−5√5 C 6√3+√2 D 6√3−√2 Answer is A How we got to the answer √108+√125−√75 = √3×36+√5×25−√3×25 = 6√3+5√5−5√3 = √3+5√5