SOLUTION: The width of a rectangle is 4 units less than the length. The area of the rectangle is 12 square units. What is the width, in units, of the rectangle?

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: The width of a rectangle is 4 units less than the length. The area of the rectangle is 12 square units. What is the width, in units, of the rectangle?       Log On


   

Question 1205280: The width of a rectangle is 4 units less than the length. The area of the rectangle is 12 square units. What is the width, in units, of the rectangle?

Found 2 solutions by Alan3354, josgarithmetic:
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
think about it.
Hint: there's an integer solution.

Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
x length
x-4 width


x%28x-4%29=12


Think of some simple known factorizations of 12.
6%2A2=4%2A3=12%2A1=12


You see the first combination works, the two differing by 4.
Length, 6
Width, 2