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Algebra

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Please help. I have tried many times to come up with something after reading the material but I am completely stumped.

A cubic container, with sides of length, x inches, has a volume equal to x^3 cubic inches. The height of the container was decreased and the length was increased so that the volume is now modeled by the expression

x^3+4x^2-5x

By how many feet were the height and length changed?
(Hint: Volume = length times width times height)

  • Algebra -

    your new expression factors to
    x(x+5)(x-1)

    so I would say the length was increased by 5, the width remained the same and the height was shortened by 1

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