Question

[8.03]

Factor completely: x2 − 3x − 28

(x − 7)(x + 4)
(x − 4)(x + 7)
(x + 28)(x − 1)
(x − 14)(x + 2)

Answer 1

To factor this quadratic equation, you're looking for two numbers that multiply together to give us -28 (the last term) and add together to give us -3 (the coefficient of the x term). Or, you can FOIL out the four answer choices and see which one works.

Answer 2

@vinnv226 so would it be 2

Answer 3

No, because -4 + 7 gives you positive 3. You need them to add up to negative 3.

Answer 4

@vinnv226 i keep getting 2 and 3

Answer 5

what can you multiply to get -28 but add to get -3