Question

if p(x) = x^2, then p( a +1) - p ( a-1) ==​

Answer 1

     

$p(x)=x^2 \\ \\ \\ p(a+1)-p(a-1) \\ \\ \Rightarrow\ (a+1)^2-(a-1)^2 = \bold{4a} \\ \\ \\ \[[\because\ (a+b)^2-(a-b)^2 = 4ab ]$

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