Math

According to the rational root theorem, which is not a possible rational root of x3 + 8x2 x 6 = 0?

4
2 <-- or 1?
5
1

What os 3x^4+2x^3-5x^2-4 divided by x+2

3x^3-4x^2+3x-6+8/x+2 <--?
3x^3-4x^2+3x-6+8/x-2

factor x^3+2x^2-9x-18 given that -2 is a zero

(x+2)(x-sqrt3)(x+sqrt3)=0
(x-2)(x-3)(x+3)=0
(x+2)(x-3)(x+3)=0 <--?
(x-2)(x^2-9)=0

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