Question

пжжжжжжжжжжж решите 1и2

Answer 1

8х²-4х-х²+9=7х²-4х+9
х²-11х+3х-33+х²+12х+36=2х²+4х+3
7(а²+2аb+b²)-14ab=7a²+14ab+7b²-14ab=7a²+7b²
2//
у³-49у=у(у²-7)
-3а²-6ab-3b²=-3(а²+2аb+b²)=-3(a+b)²