а)3x (x-2)
б)x^2y^2 (x+2y)
в)(2x+4)^2
г)(x^2-2y^2)^2
д)(5x^2+y^2)^2
е)(-3a^5+2,5b)^2

а) 3x(x-3)=3x*x-3x+3=3x^2-9xб) х^2у^2(х+2у)=х^2у^2+х^2у^2+2у=х^3у^2+2х^2у^3в) (2х+4)^2=(2х)^2+2*2х*4+4^2=4х^2+16х+16