Question

simplificando a expressao √5+√20-3√45+√125

Answer 1

= √5 + √20 - 3√45 + √125
= √5 + √4.√5 - 3.√9.√5 + √25.√5
= √5 + 2√5 - 3.3√5 + 5√5
= √5 + 2√5 - 9√5 + 5√5
= √5 + 2√5 + 5√5 - 9√5
= 8√5 - 9√5
= - 9√5 + 8√5
= - √5