Answer
a. $4a-1$
b. $-4x-1$
c. $4x+4h-1$
Work Step by Step
We are given that $P(x)=4x-1$
$P(a)=4(a)-1=4a-1$
$P(-x)=4(-x)=-4x-1$
$P(x+h)=4(x+h)=4x+4h-1$
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