SOLUTION: 8. The length of a rectangle is 3 meters more than its width. If the area is 108 square meters, what are the length and width?
OK I definetly need some help with these, please!
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Question 507705: 8. The length of a rectangle is 3 meters more than its width. If the area is 108 square meters, what are the length and width?
OK I definetly need some help with these, please!
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
Let x = width, so length is then x+3
Area = Length*Width
A = LW
108 = (x+3)*x
108 = x(x+3)
108 = x^2+3x
0 = x^2+3x-108
0 = (x-9)(x+12)
(x-9)(x+12)=0
x-9 = 0 or x+12 = 0
x=9 or x=-12
Throw out the negative width to get x = 9
So the width is 9 meters and the length is 12 meters (since 9+3=12)
Let me know if you need more help or if you need me to explain a step in more detail.
Feel free to email me at jim_thompson5910@hotmail.com
or you can visit my website here: http://www.freewebs.com/jimthompson5910/home.html
Thanks,
Jim
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