Question

$\sqrt{2x ^{2} } + y \: para \: x = - 2 \: e \: y = 8$
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Answer 1

$\sqrt{2 \times { (- 2)}^{2} } + 8 \\ \sqrt{2 \times 4} + 8 \\ \sqrt{8} + 8 \\ 2 \sqrt{2 } + 8$