Posted by jen on Sunday, September 5, 2010 at 7:35am.
That is the difference of two squares. Remember that a^2 - b^2 = (a+b)(a-b)
Think of "a" as 5w and "b" as 12.
Now write down the answer.
25+12=37
25-12=13
37*13=481
so the answer is 481??
No. Where did the w go?
They are asking for the expression
25w^2 - 144
to be factored, not evalauated.
The answer is
(5w + 12)(5w - 12)
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