9x^2 + 2^2 = 0
3x +2 = 0
therefore: x=-2/3
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(9x)2 +9x/(45x)2 +81= 9+9x/86
9x squared plus 16 = 0 factored is plus and minus 4/3 i.
It can't be solved because the discriminant of the given quadratic equation is less than zero meaning it has no real roots.
It can't be factored because the discriminant of this quadratic expression is less than zero.
If you mean: x2+9x+20 then it is (x+4)(x+5) = 0 when factored