Odpowiedź :
c) 2x(2x-3)-x²(x-1)=4x-6x-x³+x²
A)(7x-8)(5x-3)=35x²-21x-40x+24=35x²-61x+24
B)(-4a-7)(-3a+8)=12a²-32a+21a-56=12a²-11a-56
C)(-1,8x²-4)(5x²-0,6)=-9xdo potegi 4 +1,2-20x²-2,4=-9xdo potegi 4 -1,2-20x²
A)(7x-8)(5x-3)=35x²-21x-40x+24=35x²-61x+24
B)(-4a-7)(-3a+8)=12a²-32a+21a-56=12a²-11a-56
C)(-1,8x²-4)(5x²-0,6)=-9xdo potegi 4 +1,2-20x²-2,4=-9xdo potegi 4 -1,2-20x²