Question

ПОМОГИТЕ СРОЧНО ПОЖАЛУЙСТА

Answer 1

Объяснение:

№2(а)

(х-2)(х-11)-2х(4-3х)=

=х²-11х-2х+22-8х+6х²=

=7х²-21х+22

№2(б)

(х-8)(2х-1)-(3х+1)(5х-2)=

=2х²-х-16х+8-(15х²-6х+5х-2)=

=2х²-х-16х+8-(15х²-х-2)=

=2х²-х-16х+8-15х²+х+2=

= -13х²-16х+10

№2(в)

(х+2)²-(х-3)(3+х)=

=х²+4х+4-(3х+х²-9-3х)=

=х²+4х+4-(х²-9)=

=х²+4х+4-х²+9=

=4х+13

№2(г)

(х-2)(х+3)-(х-1)²+(5-х)(5+х)=

=х²+3х-2х-6-(х²-2х+1)+25-х²=

=х²+х-6-х²+2х-1+25-х²=

= -х²+3х+18

№2(д)

(х-7)(3х-2)-(5х+1)(2х-4)=

=3х²-2х-21х+14-(10х²-20х+2х-4)=

=3х²-2х-21х+14-(10х²-18х-4)=

=3х²-2х-21х+14-10х²+18х+4=

= -7х²-5х+18

№3(а)

6а-4b=2(3a-2b)

№3(б)

3а²-6аb=3a(a-2b)

№3(в)

а⁷+а⁴=а⁴(а³-1)

№3(г)

-4а⁸+16а⁴= -4а⁴(а⁴-4)

№3(д)

8a²b³-12a⁴b²=4a²b²(2b-3a²)