Question

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

Answer 1

Help! I will give a medal. (I know how to give them now)

Answer 2

Factor the trinomial. You are looking for 2 numbers that when multiplied will equal -21 but when added will equal 4:

(x + )(x - )

Answer 3

-7 and 3

Answer 4

wait, no

Answer 5

-3 and 7