Calculate the value of p, if $f(p)= P^2

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Calculate the value of p, if $f(p)= P^2 - 28p+196$ .

A16

B14

C12

D18

Answer:

$f(p)= P^2 - 28p+196$

$P^2 -28p + 196= 0$

$= (p-14)(p-14)= 0$

Therefore p= 14

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