Odpowiedź:
3(4x-4y+5)-3(x+2y-3)+2(3x+y-6)=12x-12y+15-3x-6y+9+6x+2y-12=15x-16y+12=15*2-16*1+12=30-16+12=26
(2x-3)(4x-7)=8x2-14x-12x+21=8x2-26x+21
