Please Answer this quetion?

Question

x^4+2x^2-2x=

Answer 1

random choice of x value of 1
(x^4+2x^2)-2x=?
(1^4 +2^2)-2=
(1+8)-2=
9-2=7

Answer 2

x^4+2x^2 - 2x

= x (x^3+2x-2)

Because the remaining part is a cubic equation, quadratic equation won't solve the problem.

x (x^3+2x-2) is the farthest you can go with simplifying this problem.

Answer 3

x^4 + 2x^2 - 2x =
x(x^3 + 2x - 2)
There are two "real" roots and two complex roots.
The real roots are
x = 0
x ≈ 0.7709169975
(found numerically by spreadsheet)
The complex roots can be found by dividing
x^3 + 2x - 2 by x - 0.7709169975 and solving the resulting quadratic by quadratic equation or completing the square.
Other methods for finding the roots of the cubic are presented here:
http://en.wikipedia.org/wiki/Cubic_equation

Answer 4

x^4+2x^2-2x=(x)(x^3+2x-2)

no better answer