Ответ:

Объяснение:

1. = 5a-2b-4a+3b+2a=3f+b

  = 3x²-6x -5x²-15x = -2x²-21x

  = x³- x - 6x² +6 -x³ = -6x²-x +6

  = x²-2x+7x-14 = x²+5x-14

  = y³-3y²+8y+5y²-15y+40 = y³+2y²-7y+40

  = 24c²+12ac-6ac-3a² = 24c²+6ac-3a²

2. = (y+2)*(a-b)

  = 3(x-y)+a(x-y) = (3+a)*(x-y)

3. = x²y+xy²-(x³-2x²y+y²x-2y³) = x²y+xy²-x³+2x²y-xy²+2y³=2y³-x³+3x²y

4. = 30y-6-27y+12= 3y+6     3*(-4)+6=-12+6=-6

= 2a²(a-7)       = (3x³+9x) -(2x²+6) = 3x(x²+3)-2(x²+3)= (3x-2)*(x²+3)

Ответ:

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