Observe the figure:

Area of the rectangle is .

Length of the rectangle is and width of the rectangle is .

Standard form of the area of the rectangle is .

Find -value.

                                        (Formula for area)

                      (Substitute , and )

                         (Multiply) 

    (Subtract from each side)

                         (Apply additive inverse property: )

            (Write as a pattern)

       (Group with the factors)

           (Factors of GCF)

                     (Take out common factor)

or                        (Apply zero productive property)

The value of is or .

Dimensions cannot be negative.

Hence consider .

Length of the rectangle is .

Width of the rectangle is .

The value of is or .

Length of the rectangle is .

Width of the rectangle is .