## anonymous 4 years ago Factor x²+4x-4

1. anonymous

is it a quadratic equation question ?

2. anonymous

Do you mean x²+4x+4?

3. anonymous

no it's -4 i've been working on it, but it's no factoring :/

4. anonymous

Because factoring x²+4x-4 is pretty difficult.

5. anonymous

Well, It's safe to say that it cannot be factored.

6. anonymous

Using the quadratic formula would be the easiest method

7. anonymous

@Copythat How can quadratic formula help us to factor it?

8. anonymous

yeah, i dont think the formula's working

9. anonymous

$\lim_{x \rightarrow -3} \frac{ x^2+4x-4 }{ x-3 }$

10. anonymous

You could try factoring out the x. x(x+4)-4

11. anonymous

I don't see why you have to factor the numerator. All you have to do is plug -3 into x.

12. anonymous

but the i get a number over x

13. anonymous

What do you mean? Ave to do is plug -3, like this:$\frac{ (-3)^2 + 4(-3) - 4 }{ (-3) - 3 }$

14. anonymous

yes you're right i got 7/6

15. anonymous

Yeah. Glad I helped.