Question

Разложите на множители: 1) 36m^2n^3 - 49m^4n 2) -50-20x-2x^2

Answer 1

$36m^2n^3 - 49m^4n=nm^2(6^2n^2-7^2m^2)= \\ =nm^2(6n-7m)(6n+7m)$

$-50-20x-2x^2=-2(25+10x+x^2)=-2(5+x)^2$