Question

разложить на множители 3ab - a^2
4b^3 - 3b^5
-15a^3 - 5ab^2 - 10a^2b^4

Answer 1

$3ab - a^2=3a(b-a) \ 4b^3 - 3b^5=b^3(4-3b^2) \ -15a^3 - 5ab^2 - 10a^2b^4=-5a(3a^2+b^2+2ab^4)= \ =-5a(3a^2+b^2(1+2ab^2))$