Find quadratic equation

[sail3005]

Find equation of quadratic function:

it's graph is a parabola with x-intercepts 2 and -1 and y-intercept 6.

Please, i really need help on this!!!

[nishantp]

I dont know jack about quaderatic equations myself, but Kaverin posted a functionn that might help:
here (http://www.vbforums.com/showthread.php?s=&threadid=103342)

[Bjwbell]

I'ts easy just setup three equations

6=a*0^2 + b*0 +m
m=6

0=a*2^2+b*2+6
0=a*(-1)^2+b*-1+6
solve for a and b

a=-3
b=3
so
y=-3x^2+3x+6

[sail3005]

thanks that helped a lot

[Bjwbell]

Wow! i helped someone:)