Answers

2016-04-12T14:28:05+05:30
2016-04-12T14:38:17+05:30
√45 - 3√20 +4√5
=√ (9 ×5) - 3√( 5×4) +4√5
= 3√5 - 3×2√5 + 4√5
= 3√5 - 6√5 +4√5
= -3√5 + 4√5
= √5 
√5 is the answer
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