= 3 - 2х -8 + х = - х -5 = - (х+5) = -1
х² -25 (х-5)(х+5) (х-5)(х+5) х-5
= у²+30+6-12 у = у² - 12у +36 = (у-6)² = у-6
у-6 у-6 у-6
= 2(3-в) + в(2-9в) = 6-2в+2в-18в² = 6-18в² = 6(1-3в²) = 1-3в²
6в⁴ 6в⁴ 6в⁴ 6в⁴ в⁴
= (х+5)(х-2) - (3х-10) = х²+3х-10-3х+10 = х²
х-2 х-2 х-2
= х(х+2у) + 2у² = х - 2у² = ху-2у² = у(х-2у) = 1
(х-2у)(х+2у) у(2у-х) (х-2у) у(х-2у) у(х-2у) у(х-2у)