SOLUTION: The area of a rectangle is 45 square cm. If the length is 4 cm greater than the width, what are the dimension of the rectangle?

SOLUTION: The area of a rectangle is 45 square cm. If the length is 4 cm greater than the width, what are the dimension of the rectangle?

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Question 322033: The area of a rectangle is 45 square cm. If the length is 4 cm greater than the width, what are the dimension of the rectangle?
Answer by Jk22(389) (Show Source): You can put this solution on YOUR website!
let w the width : w(w+4)=45=>w^2+4w+45=0
=>w=(-4+-sqrt(196))/2=5,-9=(-4(+/-)14)/2
-9 is nonsense, so width=5cm, length=4+5=9cm (5cm*9cm=45cm^2)
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