SOLUTION: The line of symmetry of the parabola whose equation is y = ax^2 - 4x + 3 is x = -2. What is the value of "a"? it has to be one of the following. -2 -1 -1/2

Question 749332: The line of symmetry of the parabola whose equation is y = ax^2 - 4x + 3 is x = -2. What is the value of "a"?
it has to be one of the following.
-2
-1
-1/2
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
? The average of the roots would be -2, also.
Let the roots be the variables, r and s.

and
and
and
and
and

Knowing what the sum of these roots must be,

The Answer------------------------------
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