Simplify frac 2m - u 2 - m - 2u 2 5m 2 - 5u 2 - JAMB Mathematics 1994 Question
Simplify \(\frac{(2m - u)^2 - (m - 2u)^2}{5m^2 - 5u^2}\)
A
\(\frac{3}{5}\)
B
\(\frac{2}{5}\)
C
\(\frac{2m - u}{5m + u}\)
D
\(\frac{m - 2u}{m + 5u}\)
correct option: a
\(\frac{(2m - u)^2 - (m - 2u)^2}{5m^2 - 5u^2}\)
= \(\frac{2m - u + m - 2u)(2m - u - m + 2u)}{5(m + u)(m - u)}\)
= \(\frac{3(m - u)(m + u)}{5(m + u)(m - u)}\)
= \(\frac{3}{5}\)
= \(\frac{2m - u + m - 2u)(2m - u - m + 2u)}{5(m + u)(m - u)}\)
= \(\frac{3(m - u)(m + u)}{5(m + u)(m - u)}\)
= \(\frac{3}{5}\)
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