Question

What are the roots of the polynomial equation x^3 - 7 x = 6x - 12

Answer 1

x(roots) = 3, 1, -4.

Explanation:

Find the roots by solving for x.

Hope this helps,

Davinia.

Answer 2

x^3 - 7x = 6x -12

Subtract 6x from both sides:

x^3 - 13x = -12

Add 12 to both sides:

x^3 - 13x +12 = 0

Factor the left side:

(x-3) (x-1)(x+4) = 0

Now solve for x in each set of parenthesis so they all equal 0:

x = 3

x = 1

x = -4

The roots are 3,1, -4