Homework Help: Algebra

Posted by Laura on Thursday, October 16, 2008 at 7:11pm.

Can someone help me figure out what formula I am to use for this word problem? I am having a hard time.

If the sides of a square are lengthened by 7cm the area of the square becomes 121cm^2. What is the length of a side of the orgional square?

Algebra - Damon, Thursday, October 16, 2008 at 7:13pm
(x+7)^2 =121
x+7 = +/- 11
x = 3 or -18
-18 will not do so use 3
- Algebra - Laura, Thursday, October 16, 2008 at 7:18pm
  Thank you!

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