POMOCY POTRZEBNE MI NA TERAZ ! DAJE NAJ Doprowadź wyrażenia do najprostszej postaci: a) (x-2) (x(do kwadratu)- 3x-1) b) (4-3x+2x(do kwadratu)) (2x-3) c) (2a-b) (3a+4b) - 2 (a+3b) (b-2a) d) -(4a-3b) (a-b) +3 (a+2b) (b-3a)

(x-2)(x²-3x-1)=x³-3x²-x-2x²+6x+2=x³-5x²5x+2 (4-3x+2x²)(2x-3)=(2x-3)(4-3x+2x²)=8x-6x²+4x³-12+9x-6x²=17x-12x²+4x³-12 (2a-b)(3a+4b)-2(a+3b)(b-2a)=(6a²+8ab-3ab-4b²)-2(ab-2a²+3b²-6ab)=(6a²+5ab-4b²)-2(-5ab-2a²+3b²)=6a²+5ab-4b²+10ab+4a²-6b²=10a²+15ab-10b² -(4a-3b)(a-b)+3(a+2b)(b-3a)= -(4a²-4ab-3ab+3b²)+3(ab-3a²+2b²-6ab)= -(4a²-7ab+3b²)+3(-5ab-3a²+2b²)= -4a²+7ab-3b²-15ab-9a²+6b²= -13a²-8ab+3b²