SOLUTION: A rectangle has length 6cm greater than its width. Find its width given that its area is 91cm^2

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Question 273618: A rectangle has length 6cm greater than its width. Find its width given that its area is 91cm^2
Answer by bobdabuildr(27) About Me  (Show Source):
You can put this solution on YOUR website!
Width = x
Length = 6+x
Area = length X width
91=x(x+6)
91=x^2 + 6x
0= x^2 +6x-91
0=(x+13)(x-7)
x=-13 or x=7
Since distance can not be negative the x=-13 is an erroneous answer
Check
91=7(6+7)
91=91