Zapisz sumę w postaci iloczynu: a) 4x(2x+7)-3(2x+7) b) (13x-7)*3x-(13x-7)*4 c) x(2y-1)-(2y-1)+2(2y-1) d) 5x(-3y+2z)-(2z-3y) e) y(2xdo2+5)-(5+2xdo2)-3x(2xdo2+5) f) 2z(5x-y)-2(5x-y)-(-y+5x)

A) 4x(2x+7)-3(2x+7)= 8x²+28x-6x-21= 8x²+22x-21 b) (13x-7)*3x-(13x-7)*4 39x²-21x-52x+28= 39x²-73x+28 c) x(2y-1)-(2y-1)+2(2y-1)= 2xy-x-2y+1+4y-2= 2xy-x+2y-1 d) 5x(-3y+2z)-(2z-3y)= -15xy+10xz-2z+3y e) y(2x^+5)-(5+2x^)-3x(2x^+5)= 2x²y+5y-5-2x²-6x³-15x   f) 2z(5x-y)-2(5x-y)-(-y+5x)= 10xz-2yz-10x+2y+y-5x= 10xz-2yz-15x+3y :)