x3 + 3×2 – 5x – 15

x3 + 2×2 – 3x – 6

x3 – 3×2 – 5x + 15

x3 – 2×2 – 3x + 6

### 3 Answers

1) x^3+3x^2-5x-15=0 has 3 distinct real roots:

x=-3, x=+/- 2.236068=+/-sqrt(5)

2) x^3+2x^2-3x-6=0 has 3 distinct real roots:

x=-2, x=+/- 1.732051=+/- sqrt(3)

3) x^3-3x^2-5x+15=0 has 3 distinct real roots:

x=3, x=+/-2.236068=+/-sqrt(5)

4) x^3-2x^2-3x+6=0 has 3 distinct real roots:

x=2, x=+/- 1.732051=+/-sqrt(3). Answer.

x = √3 and again, √3 and 2??

Hence, (x – √3)(x – √3)(x – 2)…??

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