Question

punctele d, e si f va rog urgent ​

Answer 1

Răspuns:

d)(3a-5)²-2(5-3a)+(a-5)(3a-5)=9a²-30+25-10+6a+3a²-5a-15a+25=12a²-44a+40

e)(5-2x)(7x-2)+7x(2-7x)+(7x-2)²=35x-10-14x²+4x+14-49x+49x²-28x+4=-38x+8+35x²=35x²-38x+8

f)(y-6)³+(y+1)(y-6)²-(5-3y)(y-6)²=(y-6)²(5y-10)=(y-6)²×5(y-2)=5(y-6)²(y-2)