Question

Efetue as somas algebricas
v28-5v63+5v7=

Answer 1

Ola Larissa

√28 - 5√63 + 5√7 =

2√7 - 15√7 + 5√7 = -8√7

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Answer 2

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$\sqrt{28} -5 \sqrt{63} +5 \sqrt{7} = \\ \\ \sqrt{2^2.7} -5 \sqrt{3^2.7} +5 \sqrt{7} = \\ \\ 2 \sqrt{7} -5.3 \sqrt{7} +5 \sqrt{7} = \\ \\ 2 \sqrt{7} -15 \sqrt{7} +5 \sqrt{7} = \\ \\ 7 \sqrt{7} -15 \sqrt{7} =-8 \sqrt{7}$