Question

$\sqrt{400}$
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Answer 1

Answer:

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Answer 2

Step-by-step explanation:

$\sqrt{400}$

we know that

factor of 400

$400 = 2 \times 2 \times 2 \times 5 \times 10 \\ 400 = 20 \times 20$

$\sqrt{400} = {20}^{ \frac{2}{2} }$

sqrt 400 = +20 and -20

-20 is because the square of -20 is also 400

+20 is because the square of +20 is also 400