SOLUTION: I don't understand this problem can someone please help me. The area of a rectangle is 45 square cm. If the length is 4 cm greater than the width, what are the dimensions of the r

Question 128995: I don't understand this problem can someone please help me. The area of a rectangle is 45 square cm. If the length is 4 cm greater than the width, what are the dimensions of the rectangle?.

Answer by oscargut(2103) (Show Source): You can put this solution on YOUR website!
you have to find the length and the width of the rectangle
let denotate L=length and W=width
L=W+4

area = L*W =45 then (W+4)W=45 then W^2+4W-45=0
then
=
=
=
solutions are W=-9 and W=5 then W=5
then W=5 and L=9

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