For some constants a and b, find the derivative of

(x − a) (x − b)

Let f(x) = (x – a)(x – b)


⇒ f(x) = x2 – (a + b)x + ab




Since,


f’(x) = 2x – (a + b) + 0


= 2x – a – b


∴ f’(x) = 2x – a – b


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