1. a) 3(x+3)–y(x+3)=(x+3)(3–y)
б) 2(х^2+2)–х^4(2+х^2)=(х^2+2)(2–х^4)
2. 2ху–4у–х^3–2х^2 = 2у(х–2)–х^2(х+2)=2•2(2–2)–2^2(2+2)=–16
3. 42а^3b^2cd+7a^2bc+14d^2 =
= 7(6a^3b^2cd+a^2bc+2d^2)
4. 0,226•0,004–0,226^2+0,222•
•0,326=0,226(0,004–0,226)+0,222•
•0,326=0,226•(–0,222)+0,222•0,326
= 0,222(0,326–0,226)=0,222•0,1=
=0,0222