SOLUTION: y = (-4x^2) - 12x + 9 a. Determine the vertex of the function b. determine if the funtion is concave up or down c. Determine the zeros if any

Question 318058: y = (-4x^2) - 12x + 9
a. Determine the vertex of the function
b. determine if the funtion is concave up or down
c. Determine the zeros if any
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
y = (-4x^2) - 12x + 9
Complete the square and put the eqaution in vertex form,
where (h,k) is the vertex.

.
.
.
a)The vertex is (,).
b) The parabola opens downward since the coefficient for is negative.
c) Since the vertex occurs at y=18 and it opens downwards, the curve will cross the x-axis.

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.
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