Question

Is f(x)=(−x−4)2+3x2−3x increasing or decreasing at x=−1?

Answer 1

Answer:

F(x)=(−x−4) ^2+3x ^2−3x

F(-1)=(1-4) ^2 +3×-1 ^2 -3×-1

=9+3+3

=15

Therefore it is increasing

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