CPM Homework Help : CCA2 Problem 4-71

Factor each expression in parts (a) and (b). Then, in parts (c) and (d), factor and simplify each expression.

$\frac { a x + a } { x ^ { 2 } + 2 x + 1 }$
Hint (c):
$\frac{\textit{a}(\textit{x}+1)}{(\textit{x}+1)^{2}}$

$\frac { x ^ { 2 } - b ^ { 2 } } { a x + a b }$
Hint (d):
$\frac{(\textit{x}+\textit{b})(\textit{x}-\textit{b})}{\textit{a}(\textit{x}+\textit{b})}$