You can put this solution on YOUR website! H(x) = -5x^2 + 2x
h(-5)
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Wherever you see x, sub -5
h(-5) = -5*(-5)^2 + 2*(-5) = -125 - 10 = -135
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h(2)
Do the same with 2, then add them.
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It's a lot easier than it looks.