-x*4*cos4x + (-1)*sin4x = -4xcos(4x) - sin(4x)
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4x * x = 4x^2
ANSWER: -4X2 -8X-4x (x+2)= (-4x * x) + (-4x*2)= -4X2 -8X
The differentiation of sin x plus cosx is cos (x)-sin(x).
( u(x+h) - u(x) )/ h
Say you have y=x2 -4x +4 y=(x-2)(x-2) x*x=x2 x*-2=-2x -2*x=2x -2*-2=4 x2 -4x +4