Mrs. Jacinto asked a carpenter to construct a rectangular bulletin board. She told the carpenter that the board's area must be 18 sqaure feet.
1.Suppose the length of the board is 7ft. longer than its width what equation would represent the given situation?
2.How would you describe the equation's formulated?

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Answers

2014-06-10T08:16:00+08:00
1. let W = L + 7
A = L x W
by substitution
18 = L ( L + 7)
18 = 2L² +7L
L = 2

W = L + 7
W = 2 + 7
W = 9 ft

2. The equation formulated to get the Width using the formula Area of an rectangle 
     is a quadratic equation.

Equation formulated:

2L² + 7L -18 = 0


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