Algebra Examples

$v = 4 \sqrt{400}$

Step 1

Rewrite $400$ as $20^{2}$ .

$v = 4 \sqrt{20^{2}}$

Step 2

Multiply.

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Step 2.1

Pull terms out from under the radical, assuming positive real numbers.

$v = 4 \cdot 20$

Step 2.2

Multiply $4$ by $20$ .

$v = 80$