algebra1 help solutions

The area of a rectangular painting is given by the trinomial x2 + 4x – 21. What are the possible dimensions of the painting? Use factoring.

Options: x + 7 and x + 3
x – 7 and x + 3
x – 7 and x – 3
x + 7 and x – 3

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  1. since
    x^2+4x-21 = (x+7)(x-3)
    Looks like (d)

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    posted by Steve

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