Question

даю 45 балов!!! вариант Б2​

Answer 1

1.

a) (6x+4)(2-3x) = 12x+18x²+8-12x = 18x²+8

b) x²(x-3)(2+x²) = x³-3x²(2+x²) = x³-6x²-3x⁴

2.

a) 2bc+ac+6b+3a = 2bc+6b+ac+3a= 2b(c+3)+a(c+3)= (2b+a)(c+3)

b) x⁴+3x³-x-3= x(x³-1)+3(x³-1)=(x+3)(x³-1)

c) xy - a²-ax+ay= y(x-a)-a(x-a) = (y-a)(x-a)

3.

y³-(3y+y²)(y-3)= y³-3y²+9y+y³-3y = -3y²+9y-3y = 3y(-y+3-1)= 3y(-y+2) = -3y²+6y

-3y²+6y = -3*(1/9)²+6*(1/9)= 3*(1/81)+2/3= 1/27+2/3= 1/27+18/27 = 19/27

4.

(2-x)(3-x)=(x+2)(x-5) 6-2x -3x-x²= x²-5x+2x-10

6-x-x²=x²-3x-10

я не знаю что с этим делать