Question

$frac{2a-3b}{ a^{2} b} - frac{4a-5b}{a b^{2} }$

Answer 1

=[b(2a-3b)-a(4a-5b)]/a²b²=(2ab-3b²-4a²+5ab)/a²b²=(7ab-4a²-3b²)/a²b²