Simplifique √98 - 2√50. a) -3√2 b) 7√2 c) -7√2 d) 3√2 e) -5√2.... Pergunta de ideia deManu2108

Manu2108 @Manu2108

November 2019 1 99 Report

Simplifique √98 - 2√50.

a) -3√2
b) 7√2
c) -7√2
d) 3√2
e) -5√2

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kjmaneiro Vamos lá...

fatora o 98 e 50

98 | 2 50 |2
49 | 7 25 | 5
7 | 7 5 | 5
1 1

$\sqrt{98} -2 \sqrt{50} = \\ \\ \sqrt{2.7^2} -2. \sqrt{2.5^2} = \\ \\ 7 \sqrt{2} -2.5 \sqrt{2} = \\ \\ 7 \sqrt{2} -10 \sqrt{2} =-3 \sqrt{2} \\ \\ Letra~~A$

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