Question

Simplify 3√125+5√16-4*5√32

Answer 1

3√125 + 5√16 - 4*5√32

= 3√5*5*5 + 5 √4*4 - 4*5√4*4*2

= 3*5√5+ 5*4 - 4*5*4√2

= 15√5 + 20 - 20*4√2

= 15√5+ 20(1-4√2)

= 5 { 3√5 + 4( 1-4√2)}