Simplify $\frac{(2m - u)^2 - (m - 2u)^2}{5m^2 - 5u^2}$

$\frac{3}{5}$

$\frac{2}{5}$

$\frac{2m - u}{5m + u}$

$\frac{m - 2u}{m + 5u}$

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Correct answer is A

$\frac{(2m - u)^2 - (m - 2u)^2}{5m^2 - 5u^2}$

= $\frac{2m - u + m - 2u)(2m - u - m + 2u)}{5(m + u)(m - u)}$

= $\frac{3(m - u)(m + u)}{5(m + u)(m - u)}$

= $\frac{3}{5}$

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Simplify $\frac{(2m - u)^2 - (m - 2u)^2}{5m^2 - 5u^2}$