Finite Math Examples

$\frac{m^{2} - 4 n^{2}}{3 m n} \div \frac{{(m + 2 n^{2})}^{2}}{9 m^{2}}$

Step 1

Rewrite $4 n^{2}$ as ${(2 n)}^{2}$ .

$\frac{m^{2} - {(2 n)}^{2}}{3 m n} \div \frac{{(m + 2 n^{2})}^{2}}{9 m^{2}}$

Step 2

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

$\frac{(m + 2 n) (m - (2 n))}{3 m n} \div \frac{{(m + 2 n^{2})}^{2}}{9 m^{2}}$

Step 3

Multiply $2$ by $- 1$ .

$\frac{(m + 2 n) (m - 2 n)}{3 m n} \div \frac{{(m + 2 n^{2})}^{2}}{9 m^{2}}$