4(2а+1)²-(3а)²=(2(2а+1)-3а)) *(2(2а+1)+3а))=(4а+2-3а)(4а+2+3а)=(а+2)(5а+2)
(6x−10y)⋅(6x+10y)−36x²,
если x=3 и y=0,1
(6x−10y)⋅(6x+10y)−36x² =36x²-100y² -36x² = -100y²
Подстановка:
-100*(0,1)²= -100 * 0,01 = -1
1. (-у^7)^5*(у^3*у^8)^2 = -y^35*y^22 = -y^57
2. (а^3)^2*а^15/а^17 = a^(6+15-17) = a^4
4)а. 4(1+х)>х-2
4(1+х)-х-2=4+4х-х-2= 2+3х
б. -(2х+1)≤3(х+2)
-(2х+1)≤3(х+2)= -2х-1-3х+6= 6-5х
в. 6(2х-1)-(2+х)<0
...= 12х-6-2-х-0= 11х-8
г. 4(1-х)+5(х+8)≥0
...= 4-4х+5х+8-0= 12+х
0,5(0,5-1)/ (0,4+0,1)^2=0,5*(-0,5)/0,5^2=-1.