Question

упростите выражение a) (y-2)(y+3)(y-1)^2 B) 4(a+5)^2(4a^2+40a)

Answer 1

a) (y-2)(y+3)(y-1)²= (y²-2y+3y-6)(y²+1-2y)= (y²+y-6)(y²+1-2y)= y⁴+y²-2y³+y³+y-2y²-6y²-6+12y= y⁴-y³-7y²+13y-6
b) 4(a+5)²(4a²+40)= (16a²+160)(a²+10a+25)= 16a⁴+160a³+400a²+160a²+1600a+4000=16a⁴+160a³+560a²+1600a+
4000