Question

Simplifique a expressão
√45+√80-2√5?

Answer 1

$\sqrt{45} + \sqrt{80} -2\sqrt{5}=\sqrt{5.9}+\sqrt{2.4.5.2}-2\sqrt{5}=3\sqrt{5}+4\sqrt{5}-2\sqrt{5}=\\\boxed{5\sqrt{5}}$

Answer 2

Olá!
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Resolução,

$\mathsf{\sqrt{45} + \sqrt{80} - 2\sqrt{5}}$

Fatorando,

$\mathsf{3\sqrt{5} + 4\sqrt{5} - 2\sqrt{5}}$

$\boxed{\mathsf{= 5\sqrt{5}}}$
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Abraços!