Question

assinale a atentava correta.
a)
$2 \sqrt{16} = \sqrt{32}$
b )
$\sqrt{50 } - \sqrt{32 } = \sqrt{2}$
c)
$\sqrt{2} + \sqrt{3} = \sqrt{5}$
d)
$5 \sqrt{2} + 2 \sqrt{2} = 14$
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Answer 1

Resposta:

Letra b)

$\sqrt{50} - \sqrt{32} = \sqrt{2} \\ \sqrt{25 \times 2} - \sqrt{16 \times 2} = \sqrt{2} \\ 5 \sqrt{2} - 4 \sqrt{2} = \sqrt{2} \\ (5 - 4) \sqrt{2} = \sqrt{2} \\ (1) \sqrt{2} . \sqrt{2} \\ \sqrt{2} = \sqrt{2}$