Возможно, это правильное решение
1. 4а - аb^2 + b + b^3 = (4a - ab^2) + (b - b^3) = a (2^2 - b^2) + b(1^2 - b^2) =
= a (2 - b) * (2 + b) + b (1 - b) * (1 + b).
2. bc^2 - 2c^2 - b^3 + 2b^2 = (bc^2 - 2c^2) - (b^3 - 2b^2) = c^2 (b - 2) - b^2 *
* (b - 2)= (b - 2) * (c^2 - b^2) = (b - 2) * (c - b) * (c + b).
1) (a-4)(a+4) -2a(3-a) =a² -16 -6a +2a² =3a² -6a -16
2) (a-8)(a-7) -(a-9)² =a² -7a -8a +56 -(a² -18a +81) =a² -15a +56 -a² +18a -81 =3a -25
3) (b+3)(b-3) +(2b+3)² =b² -9 + 4b² +12b +9 =5b² +12b
4) 3(x-5)² +10x -8x² =3(x² -10x +25) +10x -8x² =3x² -30x +75 +10x -8x² =75 -20x -5x²