Question

Упростить
a2/ab-b2 + b/b-a

Answer 1

$\frac{ a^{2} }{ab- b^{2} } + \frac{b}{b-a} = \frac{ a^{2} }{b(a-b)} - \frac{b}{a-b}= \frac{ a^{2}- b^{2} }{b(a-b)} = \frac{(a-b)(a+b)}{b(a-b)}= \frac{a+b}{b}$