Question

Factor completely

-x^4-5x^2-6

I got

-1(x^2+6)(x+1)(x-1)

Is that correct

Answer 1

hmm, no, that won't work.

Answer 2

Try this: Factor out the -1 to make it look like -(x^4+5x^2+6), then recognizing the quadratic form, we can substitute u=x^2 and it becomes -(u^2+5u+6).
See what you get out of that.

Answer 3

We have not covered quadratic formula yet. Is that the only way to factor this one?

Answer 4

@precal

Answer 5

Not quadratic formula, quadratic form. i.e. it looks like a quadratic. You can factor it as normal.

Answer 6

Yup...@CliffSedge is correct