Find the derivative of f(x) = -12x2 + 9x at x = 6.
-112.5
-135
-90
-108
@ganeshie8 @hero @dan815 @perl @pooja195 @nincompoop @CGGURUMANJUNATH @zepedrix @usukidoll

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use power rule

how do i do that? can u show me step by step? @nincompoop

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