1) 3у³-36у³+108у = 3у(у²-12у+36) = 3у(у-6)²
2) mn+3m-n^2-3n = m(n+3) - n(n+3) = (m-n)(n+3)
3) (х+2)²-49=0(х+2)² = 49х+2 = ±√49х+2 = ±7х = -2 ±7х₁ = 5, х₂ = -9
1) 3у³-36у³+108у = 3у(у²-12у+36) = 3у(у-6)²
2) mn+3m-n^2-3n = m(n+3) - n(n+3) = (m-n)(n+3)
3) (х+2)²-49=0
(х+2)² = 49
х+2 = ±√49
х+2 = ±7
х = -2 ±7
х₁ = 5, х₂ = -9