Factor the expression [math]9x^2 + 169[/math].

[list=1][br][*]Determine whether an identity can be used to rewrite the expression.[br][/*][*]Identify [i]a[/i] and [i]b[/i] in the sum of squares.[br][/*][*]Factor the sum of squares.[br][/*][/list][br][br]This applet is provided by Walch Education as supplemental material for their mathematics programs. Visit [url=http://www.walch.com/]www.walch.com[/url] for more information.