(1,5х² - х) * 3х - х² * (9х - 3) = 4,5х³ - 3х² - 9х³ + 3х² = -4,5х³
Г) 99^2=(100-1)^2=100^2-2*100+1=10000-200+1=9801
е) 52^2 =(50+2)^2=50^2+2*50*2+2^2=2500+200+4=2704
з) 10.2^2=(10+0.2)^2=10^2+2*10*0.2+0.2^2=100+4+0.04=104.04
(a²+3a-2)/(2+a)=(a²+2a+a-2)/(a+2)=(a(a+2)+(a-2))/(a+2)=a+(a-2)/(a+2)=
=a+((a+2)-4)/(a+2)=a+1-4/(a+2).
a+2=1 a₁=-1
a+2=2 a₂=0
a+2=4 a₃=2.
14%=0,14
9000+0,14*9000=9000+1260=10260 (руб)
Ответ: 10260 руб.