Question #2f265

1 Answer
Nov 8, 2017

Not sure if you are saying that 2 and -6 are the roots, but if so, the equation is

x^2+4x-12=0

Explanation:

If 2 and -6 are the roots, then they must be the values of x that make the equation equal zero. This means we can write the factored form of the equation as

(x-2)(x+6)=0

(You can confirm that either x=2 or x=-6 would cause this to become zero.)

Now , use the FOIL method to multiply the binomials

(x)(x) + (x)(6) + (x)(-2) + (-2)(6) = 0

x^2 +6x -2x-12=0

x^2+4x-12=0

That is your equation. It includes a=1, b=4 and c=-12