Simplify ((3x+6y)/(x^2-y^2))÷((5x+10y)/(x^2-2xy+y^2))

$\frac{3 x + 6 y}{x^{2} - y^{2}} \div \frac{5 x + 10 y}{x^{2} - 2 x y + y^{2}}$

To divide by a fraction, multiply by its reciprocal.

$\frac{3 x + 6 y}{x^{2} - y^{2}} \cdot \frac{x^{2} - 2 x y + y^{2}}{5 x + 10 y}$

Factor $3$ out of $3 x + 6 y$ .

Factor $3$ out of $3 x$ .

$\frac{3 (x) + 6 y}{x^{2} - y^{2}} \cdot \frac{x^{2} - 2 x y + y^{2}}{5 x + 10 y}$

Factor $3$ out of $6 y$ .

$\frac{3 (x) + 3 (2 y)}{x^{2} - y^{2}} \cdot \frac{x^{2} - 2 x y + y^{2}}{5 x + 10 y}$

Factor $3$ out of $3 (x) + 3 (2 y)$ .

$\frac{3 (x + 2 y)}{x^{2} - y^{2}} \cdot \frac{x^{2} - 2 x y + y^{2}}{5 x + 10 y}$

Since both terms are perfect squares, factor using the difference of squares formula, $a^{2} - b^{2} = (a + b) (a - b)$ where $a = x$ and $b = y$ .

$\frac{3 (x + 2 y)}{(x + y) (x - y)} \cdot \frac{x^{2} - 2 x y + y^{2}}{5 x + 10 y}$

Factor using the perfect square rule.

Check that the middle term is two times the product of the numbers being squared in the first term and third term.

$2 x y = 2 \cdot x \cdot y$

Rewrite the polynomial.

$\frac{3 (x + 2 y)}{(x + y) (x - y)} \cdot \frac{x^{2} - 2 \cdot x \cdot y + y^{2}}{5 x + 10 y}$

Factor using the perfect square trinomial rule $a^{2} - 2 a b + b^{2} = {(a - b)}^{2}$ , where $a = x$ and $b = y$ .

$\frac{3 (x + 2 y)}{(x + y) (x - y)} \cdot \frac{{(x - y)}^{2}}{5 x + 10 y}$

Simplify terms.

Factor $5$ out of $5 x + 10 y$ .

Factor $5$ out of $5 x$ .

$\frac{3 (x + 2 y)}{(x + y) (x - y)} \cdot \frac{{(x - y)}^{2}}{5 (x) + 10 y}$

Factor $5$ out of $10 y$ .

$\frac{3 (x + 2 y)}{(x + y) (x - y)} \cdot \frac{{(x - y)}^{2}}{5 (x) + 5 (2 y)}$

Factor $5$ out of $5 (x) + 5 (2 y)$ .

$\frac{3 (x + 2 y)}{(x + y) (x - y)} \cdot \frac{{(x - y)}^{2}}{5 (x + 2 y)}$

Combine.

$\frac{3 (x + 2 y) {(x - y)}^{2}}{(x + y) (x - y) (5 (x + 2 y))}$

Cancel the common factor of $x + 2 y$ .

Cancel the common factor.

$\frac{3 (x + 2 y) {(x - y)}^{2}}{(x + y) (x - y) (5 (x + 2 y))}$

Rewrite the expression.

$\frac{3 {(x - y)}^{2}}{(x + y) (x - y) \cdot (5)}$

Cancel the common factor of ${(x - y)}^{2}$ and $x - y$ .

Factor $x - y$ out of $3 {(x - y)}^{2}$ .

$\frac{(x - y) (3 (x - y))}{(x + y) (x - y) \cdot (5)}$

Cancel the common factors.

Factor $x - y$ out of $(x + y) (x - y) \cdot (5)$ .

$\frac{(x - y) (3 (x - y))}{(x - y) ((x + y) \cdot (5))}$

Cancel the common factor.

$\frac{(x - y) (3 (x - y))}{(x - y) ((x + y) \cdot (5))}$

Rewrite the expression.

$\frac{3 (x - y)}{(x + y) \cdot (5)}$

Move $5$ to the left of $x + y$ .

$\frac{3 (x - y)}{5 (x + y)}$

Simplify ((3x+6y)/(x^2-y^2))÷((5x+10y)/(x^2-2xy+y^2))

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