Question

Find the value of this expression if x=-6 x^2-6/x-4

Answer 1

x=−0.825789

Explanation:

x=(−6x3−4x−6)/x

Step 1: Multiply both sides by x.

x2=−6x3−4x−6

x2−(−6x3−4x−6)=−6x3−4x−6−(−6x3−4x−6)(Subtract -6x^3-4x-6 from both sides)

6x3+x2+4x+6=0

(Use cubic formula)

x=−0.825789

Answer 2

- 3

Explanation:

Substitute x = - 6 into the expression

`((-6)^2-6)/(-6-4)`

=
`(36-6)/(-10)` =
`(30)/(-10)` = - 3