Question

Помогите срочно 55 баллов​

Answer 1

1 Задание.

а)-4,5а³bc•1,2ab²c³=(-4,5•1,2)a⁴b³c⁴=-5,4a⁴b³c⁴.

b)(-3 3/4)b³c²•(-8/25)b²c³=(15/4•8/25)b^5c^5=6/5b^5c^5=1 1/5b^5c^5.

2 Задание.

(х-1)(х-3)(х+4)-(х+1)(х+3)(х-4)=(x²-3х-х+3)(х+4)-(x²+3х+х+3)(х-4)=(x²-4х+3)(х+4)-(x²+4х+3)(х-4)=(х³+4х²-4х²-16х+3х+12)-(х³-4х²+4х²-16х+3х-12)=(х³-16х+3х+12)-(х³-13х-12)=х³-16х+3х+12-х³+13х+12=24