X^3 -9x =x(x² -9) =x(x -3)(x +3)
a²+9a-22≠0
D=81+88=169
a1= (-9+13)/2= 2
a2= (-9-13)/2= -11
Допустимые значения: a∈(-∞;-11)∪(-11;2)∪(2;+∞)
<span>2<span>a^3</span>+<span>a^2</span>−1−3<span>a^2</span>+<span>a^3</span>−a=</span><span>3<span>a^3</span>−2<span>a^2</span>−1−a=</span><span><span>3<span>a^3</span>−2<span>a^2</span>−a−1</span></span>