college algebra
posted by bridgerunner .
The area of a rectangular swimming pool is given by 4x^2+19x+12ft^2.One side length of the pool is given by 4x + 3 feet. What is an algebraic expression for the other side length of the pool?

divide
******_ x______+ 4___________
4x+3  4 x^2 + 19 x + 12
*******4 x^2 + 3 x
*******
*************** 16 x + 12
*************** 16 x + 12
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