The length of a rectangle is 3 centimeters less than its width. What are the dimensions of the rectangle if its area is 54 square centimeters?
2 Answers
Width
Length
Explanation:
Let
Let area be
We then do the Discriminant of the equation:
So
So width
Length is
Explanation:
In this question, the length is less than the width. It does not matter at all - they are just names for the sides. Usually the length is longer, but let's go with the question.
Let the width be
The length will be
The area is found from
Factorise: Find factors of
There must be more negatives:
Solve for
the width is