(a-c)(a²+ac+c²)=a³-c³
(3x+1)(9x²-3x+1)=27x³+1
(x²+5)²=x^4+10x²+25
(3a²-5x)²=9a^4-30ax+25x²
(10x^4-6y³)²=100x^8-120x^4y³+36y^6
2a³+8a²-ab+c
a= - 3
2·(-3)³+8·(-3)²-(-3)b+c =2·(-27)+8·9+3b+c=-27+72+9b+c=3b + c + 18
a=2
2·2³+8·2²-2b+c =2·8+8·4-2b+c=16+32-2b+c=- 2b + c + 48
+_______________
<span>1)y=3\x. 10000000000000000000000000\%</span>
{5х²-3х-2≥0;х+2≠0; Д=49;х₁=-0,4;х₂=1; х≠-2; (х+0,4)(х-1)≥0 + - + ------₀--------·-----·-- -2 -0,4 1 Ответ:(-∞;-2)U(-2;-0;4]U[1;+∞)
A:m=1,8 => a=1,8m
(a/m)*100\%-100\%=(1,8m/m) *100\% - 100\%= 180\%-100\%=80\%
Ответ: на 80\%