Pre-Algebra Examples

$\sqrt{\frac{45 x^{2} y}{49}}$

Step 1

Rewrite $\frac{45 x^{2} y}{49}$ as ${(\frac{3 x}{7})}^{2} (5 y)$ .

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Factor the perfect power ${(3 x)}^{2}$ out of $45 x^{2} y$ .

$\sqrt{\frac{{(3 x)}^{2} \cdot (5 y)}{49}}$

Factor the perfect power $7^{2}$ out of $49$ .

$\sqrt{\frac{{(3 x)}^{2} \cdot (5 y)}{7^{2} \cdot 1}}$

Rearrange the fraction $\frac{{(3 x)}^{2} \cdot (5 y)}{7^{2} \cdot 1}$ .

$\sqrt{{(\frac{3 x}{7})}^{2} (5 y)}$

Step 2

Pull terms out from under the radical.

$\frac{3 x}{7} \sqrt{5 y}$

Step 3

Combine $\frac{3 x}{7}$ and $\sqrt{5 y}$ .

$\frac{3 x \sqrt{5 y}}{7}$