Question

how to calculate


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Answer 1

First process

$\sqrt{ {10}^{2} + {10}^{2} }$

$\sqrt{2 \times {10}^{2} }$

$\sqrt{2 } \times 10$

$10 \sqrt{2}$

Second process

$\sqrt{ {10}^{2} + {10}^{2} }$

$\sqrt{100 + 100}$

$\sqrt{200}$

$\sqrt{100 \times 2}$

$\sqrt{2} \times 10$

$10 \sqrt{2}$

So the answer is 10√2