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Let P(z)=A(z-z_0)(z-z_1). Show that P'(z)/P(z)=1/(z-z_0)+1/(z-z_1)

Let P(z)=A(z-z_0)(z-z_1). Show that P'(z)/P(z)=1/(z-z_0)+1/(z-z_1)

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