8-1,6x=6-1,5x
2=0,1x
x=2*10
x=20
3/7:2·5=3/14·5=15/14--СТОРОНА ПР-КА
A³-3a²+3a-1-4a³+4a+3a-3+3a²+3a+3=-3a³+13a-1
a=-2 -3*(-8)+13*(-2)-1=24-26-1=-3
<span>а)1/8 - а³=(0,5)³-a³=(0.5-a)(0.5²+0.5a+a²)=(0.5-a)(0.25-0.5a+a²)
б)125+b³=5³+b³=(5+b)(5²+5b+b²)=</span><span>(5+b)(25+5b+b²)
в)а³+b³=(a+b)(a²-ab+b²)
г)1-64а³=1³-(4a)</span>³=(1-4a)(1²+4a+(4a)²)=(1-4a)(1+4a+16a²)