Question

$\sqrt{40 { {}^{2} + 30}^{2} }$
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Answer 1

$5 \sqrt{2.}$

Explanation:

$\sqrt{ { {(40)}^{2} + (30) }^{2} }$

$= \sqrt{1600 + 900}$

$= \sqrt{2500}$

$= \sqrt{50}$

$= \sqrt{2 \times 25}$

$= \sqrt{2 \times {5}^{2} }$

$= 5 \sqrt{2.}$