Find all local extreme values of the given function and identify each as a local maximum, local minimum, or saddle point.
A. f(-4, 3) = 43, saddle point
B. f(4, -3) = 15, saddle point
C. f(4, 3) = -21, local minimum
D. f(-4, -3) = 79, local maximum
Answer: C
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Determine whether the equation is an identity. If it is an identity, prove it.
= 
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Factor the polynomial as a perfect square or state that it is irreducible.x2 - 12x + 144
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