SOLUTION: a rectangular sign must have an area of 11 square yards. Its length must be 6 yards more than its width.

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Question 921208: a rectangular sign must have an area of 11 square yards. Its length must be 6 yards more than its width.
Answer by ewatrrr(24785)   (Show Source): You can put this solution on YOUR website!
 
Hi,
.
A = Lw
(w+6)w = 11 yd^2
w^2 + 6w -11 = 0 (tossing out negative solution for unit measure)
w = 1.47213595499958, and L = 7.47213595499958
Solved by pluggable solver: SOLVE quadratic equation with variable
Quadratic equation (in our case ) has the following solutons:



For these solutions to exist, the discriminant should not be a negative number.

First, we need to compute the discriminant : .

Discriminant d=80 is greater than zero. That means that there are two solutions: .




Quadratic expression can be factored:

Again, the answer is: 1.47213595499958, -7.47213595499958. Here's your graph:

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