(3x - 5x) + (x2 - 6x2) = -2x -5x2 = -x(2 + 5x)
x2-3x-28
x2 - 3x + 2 = 0
3x^3
The expression x2 + 3x +8 is a quadratic trinomial.
(x2+3x-4) (x-4)
3 - 3x + x2 - x3 = (1 - x)(x2 + 3)
x3 + x2 - 3x - 3 x(x2 + x - 3) - 3
(x2 + 3x + 5)(x2 - 3x + 4)
x2 - 3X - 10 = (X - 5)(X + 2)So, (X2 - 3X -10) / (X-5) = X + 2
x2 + 3x - 40 = (x + 8)(x - 5)
The discriminant of x2+3x+4 is -7 therfore it has no real roots.