Answer:
X=-2, 1
Explanation:
Factor the equation.
y = 2x^2 +2x - 4
To make this easier, I divided the whole thing by 2, though that is optional
y = x^2 +x - 2
the form for this equation is y = ax^2 + bx + c
Now we have to find two numbers that add to 1, and multiply to -2. The numbers I find will be the x-intercepts.
The factors of -2 are:
1, -2
and
-1, 2
1 - 2 = -1, so this is the pair we use.
The x-intercepts are 1 and -2