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

(1 point)
Responses

(x + 7) and (x + 3)
(x + 7) and ( x + 3)

(x – 7) and (x + 3)
(x – 7) and ( x + 3)

(x – 7) and (x – 3)
(x – 7) and (x – 3)

(x + 7) and (x – 3)