127+(5c-3)(25c^2+15c+9);
127+(125c^3+75c^2+45c-75c^2-45c-27);
127+125c^3-27;
125c^3+100=>125*(-1(1/5))^3+100=>-216-100=-116
Х + 7 > 19
х + 7 < -19
х > 12
х < -26
------------о(-26)----------о(12)------------>
(-∝; -26); (12; +∝)
<span>(x+2)³=x³+8 </span>
x³+6x²+12x+8=x³+8
x³+6x²+12x+8-x³-8=0
6x²+12x=0
6x(x+2)=0
6x=0
x+2=0
x=0
x=-2