|
а) 3а-7а=-4а
б) -8х-5x=-13x
в) 3х-2у+4у-7х=2у-4х=2(у-2х)
||
а)-6х*3у= -18ху
б) 5,2*3с= 15,6с
x⁸ + x⁷ + 1 = x⁸ + x⁷ + x⁶ - x⁶ + 1 = (x⁸ + x⁷ + x⁶) - (x⁶ - 1) =
= x⁶(x² + x + 1) - ((x³)² - 1) = x⁶(x² + x + 1) - (x³ - 1)(x³ + 1) =
= x⁶(x² + x + 1) - (x - 1)(x² + x + 1)(x³ + 1) = (x² + x + 1)(x⁶ - x⁴ + x³ - x + 1)
V=пи*r^2*h;
h=V/пи*r^2;
d=1 => r=1/2;
h=пи/пи (1/2)^2;
h=4.
<span>х^4+6х^3=0
x^3(x+6)=0
x=0 или х+6=0 х=-6
</span>