Question

What are the factors of x2 + 7x + 12?

Answer 1

(x+4)(x+3)

You can do the FOIL method to check if it's correct.
How did I get this? It's hard to explain. Someone can explain it to you.

Answer 2

\[x^{2}+7x+12=x^{2}+4x+3x+12=x(x+4)+3(x+4)=(x+4)(x+3)\]
Thus (x+4)(x+3) are the required factors of the given expression.

Answer 3

You can only factor a trinomial with two binomial.

Answer 4

x2+7x+12=0
(x+4)(x+3)=0
x=-4,-3

Answer 5

is it -4,-4 or +4,+3

Answer 6

+4, +3.

Answer 7

Do the FOIL method.
(x+4)(x+3)
x * x = x^2
x * 3 = 3x
4 * x = 4x
4 * 3 = 12

x^2 + 3x + 4x + 12
Combine like term: 3x + 4x = 7x
Therefore, you should get:
x^2 + 7x + 12