Question

Срооочно!!! Упростить

Answer 1

125a^3-45a^2b-5ab^2+b^2
--------------------------------------
125a^2b-45ab^2-25ab+9b^2

Answer 2

Нужно упростить

Answer 3

$frac{5a^2}{b(5a-b)} - frac{b}{5(5a-b)} = frac{5a^2*5-b^2}{5b(5a-b)} = frac{25a^2-b^2}{5b(5a-b)} = frac{(5a-b)(5a+b)}{5b(5a-b)} = frac{5a+b}{5b}$