Question

8/b в квадрате +2b : 1/b+2

Answer 1

$\frac{8}{b^2+2b} : \frac{1}{b+2}=\\ \frac{8}{b(b+2)} *\frac{b+2}{1}=\\ \frac{8(b+2)}{b(b+2)*1}=\\ \frac{8}{b}$