I need help in graphing a parabola using the form f(x)=ax²+bx+c
heres the given: f(x) = -2x²+5x+12

Question

I need help in graphing a parabola using the form f(x)=ax²+bx+c
heres the given: f(x) = -2x²+5x+12

anonymous · Answer

Simplest way:
1/ make a table x , y
2/ assign some values of x, y
3/ link them.
4/ done

anonymous · Answer

Do you know f(x) is y??

anonymous · Answer

but I dont know how to assign some values. sorry I really dont get this lesson :/

anonymous · Answer

ok, go other one
when f(x) =0 , x =? solve for x from original problem, you may have 2 roots
when x =0 , f(x) =? , you have 1 answer here
so far, you have 3 points, link them.

anonymous · Answer

@Michxzs  If you do want to study, pick one method to follow. I can walk you through.
If you just want the answer, feel free to ignore me.

phi · Answer

Here is Khan doing this type of problem http://www.khanacademy.org/math/algebra/quadratics/solving_graphing_quadratics/v/graphing-a-quadratic-function

anonymous · Answer

ok thank you!