Question

The length of a rectangle is 5 inches more than its width, x. The area of a rectangle can be represented by the equation x^2 + 5x = 300. What are the measures of the width and the length?

Answer 1

Identify what you know and what you do not know:
\[Area = length \times width\]
\[Length = 5 + x\]\[Width = x\]
\[Area = x^2+5x = 300\]

Answer 2

Solve your problem for x and substitute it back into your length and width.