Сумму многочленов : 5х-(2х-3у) = (4х+2)+(-х-1)= (0,1с-0,4с²,1с-0,5с²)= (17а+12b-14с)- (11а-10b-14с)=

5x-(2x-3y)=5x-2x+3y=3x+3y=3(x+y)

(4x+2)+(-x-1)=4x+2-x-1=3x-1

(0.1c-0.4c²)-(0.1c-0.5c²)=0.1c-0.4c²-0.1c+0.5c²=0.1c²

(17a+12b-14c)-(11a-10b-14c)=17a+12b-14c-11a-10b-14c=6a+2b-28c=2(3a+b-14c)