2) 3х
2у
= х(х-2) = х
(х-2)(х+2) х+2
3) = 3с+а-а+7с = 10с = 2,5
4с 4с
= х² - 4х = х²-4х = х(х-4) = х
х-4 х-4 х-4 (х-4)
4 а) = у(у-3)+3у = у²-3у+3у = у²
у-3 у-3 у-3
б) =10х+ (х+5)(х-5) = 10х+х²-25= (х-5)(х-5)= х-5
5х(х-5) 5х(х-5) 5х(х-5) 5х
в) = 4(х-4)-х(х+4) = 4х-16-х²-4х = -х²-16 = - (х-4)(х-4) = - х-4
(х+4)(х-4) (х+4)(х-4) (х+4)(х-4) (х+4)(х-4) х+4
г) = 2p-g + p-2g = g(2p-g)+p(p-2g) = 2pg-g²+p²-2pg = p²-g² = (p-g)(p+g) = (p-g)
p(p+g) g(p+g) pg(p+g) pg(p+g) pg(p+g) pg(p+g) pg
4 a) = 3n(m-2) ×4m⁴ = 3m²
2m³×n(m-2)(m+2) m+2
б) =( х-3)(х+3)×(х+2) = х+3
(х+2)(х+2)(х-3) х+2
в)= а³×(а+2)³ =1
(а+2)³×а³