Apply the quadratic formula to find the roots of the function and then graph it........
f(x) = x^2 - 4

Question

Apply the quadratic formula to find the roots of the function and then graph it........
f(x) = x^2 - 4

anonymous · Answer

quadratic formula: (-b±sqrt(b^2-4ac))/(2a) where ax^2+bx+c

anonymous · Answer

so in this case, a=1, b=0, and c=-4
plugging it in, we get $$(-0±\sqrt{0^2-4(1)(-4)})/(2(1))$$

anonymous · Answer

so the first root is $$+\sqrt{16}/2=2$$
and the second root is $$-\sqrt{16}/2=-2$$

anonymous · Answer

Thank you

anonymous · Answer

you're welcome!

anonymous · Answer

I just really wish I understood any of that...lol............Oh well, it was worth a try...

anonymous · Answer

haha okay do you know the quadratic equation?

anonymous · Answer

formula*

anonymous · Answer

picture in your head a 43 year old woman who only managed to squeak through basic and advanced algebra, I am now teetering the line in the college algebra for the second time and it does not look good, I have been able to figure out some of this stuff but the quadratic might as well be in ancient script for all I understand of it

anonymous · Answer

I can handle the factoring, but the basic quadratic and the completing the square are next to impossible to understand unless you are a mathmatician,  I'm a graphic designer....