Given f(x) = x 2 - 4x, (A) Find f'(x). (B) Find the slopes of the lines

Question:

Given f(x) = x2 - 4x,

(A) Find f'(x). 

(B) Find the slopes of the lines tangent to the graph of fat x = 0, 2, and 4. 

(C) Graph fand sketch in the tangent lines at x = 0, 2, and 4. 

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