Question

спростити вираз (4х-3у)(х+2у)+2х(х-2у) | (2х+7у)(х-5у)-3х(х-4у)

Answer 1

(4х-3у)(х+2у)+2х(х-2у) = 4х²+8ху-3ху-6у²+2х²-4ху = 6х²+ху-6у²

(2х+7у)(х-5у)-3х(-4у) = 2х²-10ху+7ху-35у²-3х²+12ху = -х²+9ху-35у²