One quadratic function has the formula h(x) = -x 2 + 4x - 2. another quadratic function, g(x), has the graph shown below which option below best describes the maximums of these two functions? functions g and h have the same maximum of -2. functions g and h have the same maximum of 2. function h has the greater maximum of -2. function g has the greater maximum of 2.

We are comparing maxima.  From the graph we know that the max of one graph is +2 at  x = -2.  What about the other graph?  Need to find the vertex to find the max.

Complete the square of h(x) = -x^2 + 4x - 2:

h(x) = -x^2 + 4x - 2 = -(x^2 - 4x) -2
= -(x^2 - 4x + 4 - 4) - 2
=-(x^2 - 4x + 4)       -2+4
= -(x-2)^2 + 2            The equation describing this parabola is y=-(x-2)^2 + 2, from which we know that the maximum value is 2, reached when x = 2.

The 2 graphs have the same max, one at x = -2 and one at x = + 2.

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