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OpenStudy (anonymous):
find the maximum y value on the graph of y= f(x). f(x)= -x^2 +6x+10
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OpenStudy (anonymous):
well that was wrong too many minus signs
OpenStudy (anonymous):
max is when \(x=-\frac{b}{2a}=-\frac{6}{2\times (-1)}=3\) replace \(x\) by \(3\) get \[y=-3^2+6\times 3+10=-9+18+10=9+10=19\]
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