Question

СРОЧНО, СРОЧНО №309 Пожалуйста

Answer 1

1)3х²-2х-3х²-3х=-2х-3х=-5х
2)4с²-2сd-10c²-8cd=-6c²-10cd=-2c(3c+5d)
3)12m²-7n-3mn-6mn+10n-14m²=-2m²+3n-9mn

Answer 2

1) = 3x^2-2x-x^2+3x= 2x^2+x
2) = 4c^2-2cd-10c^2-8cd=-6c^2-10cd
3) = 12m^2-7n-3mn-6mn+10n-14m^2= -2m^2+3n-9mn
4) = 3n^2-2mn+4m^3-2mn-3n^3= -4mn+4m^3