SOLUTION: the width of a rectangle is 8 cm. less than its length and the area is 20 sq cm. what are the dimensions of the rectangle?

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Question 250419: the width of a rectangle is 8 cm. less than its length and the area is 20 sq cm. what are the dimensions of the rectangle?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
+A=L%2AW=20+
+W=L-8
+L%2A%28L-8%29=20
+L%5E2-8L=20
+L%5E2-8L-20=0
Factor
+%28L-10%29%28L%2B2%29=0
Keep only the positive solution.
+L-10=0
+L=10
+W=L-8
+W=2