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Simplify : √45-3√20+4√5

Answer» √45-3√20+4√5= √3×3×5 -3√2×2×5 +4√5= 3√5-6√5+4√5= 7√5 - 6√5=√5
\xa0√45 - 3√20 + 4√5=\xa03√5 -3*2√5 +4√5\xa0= 3√5-6√5+4√5= (3-6+4)√5\xa0=(-3+4)√5\xa0√45 - 3√20 + 4√5=\xa0√5


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