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Dimensions of a Rectangle Given the Area

James wanted a photo frame 3 in. longer than it was wide. The frame he chose extended 1.5 in. beyond the picture on each side.
Find the outside dimensions of the frame if the area of the unframed picture is 70 in.^2 (square inch.)

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Suppose the length of the frame is x, from the condition, its width should be x-3. ...

Solution Summary

The dimensions of a rectangle are found given the area using a quadratic equation. The solution is well explained.