The area of a rectangular painting is given by the trinomial x2 + 4x – 21. What are the possible dimensions of the painting? Use factoring.
To find the possible dimensions of the painting, we need to factor the trinomial x^2 + 4x - 21.
x^2 + 4x - 21 can be factored as (x + 7)(x - 3).
Therefore, the possible dimensions of the painting are x + 7 and x - 3.