SOLUTION: Sides of a square lengthened by 5 cm, The area becomes 121cm^2. Find the length of a side of the original square?
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Question 485239: Sides of a square lengthened by 5 cm, The area becomes 121cm^2. Find the length of a side of the original square?
Answer by jorel1380(3719) (Show Source): You can put this solution on YOUR website!
(n+5)2=121
n+5=11
n=6
n2+10n+25=121
n2+10n-96=0
(n+16)(n-6)=0
n=-16 or 6
Throwing out the negative answer, we get n=6..
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