The area of the rectangle is and its width is .

Write factors form of expression as follows.

The general factor trinomial form is .

In the above trinomial, .

Since c is negative, the factors m and p have opposite signs.

So either m or p is negative, but not both.

Since b is negative, the factor with the greater absolute value is also negative.

List the factors of , where one factor of each pair is negative and look for the pair of factors with a sum of .

Apply the pattern form: when .

because .

The factor form of expression is .

The area of rectangle is .

Therefore length of the rectangle is .

The option H is correct answer.