Question

Factor these trinomials with a POSITIVE CONSTANT ( + C)
x^2+ 7x + 12

My answer: (x + 1)(x + 12 )????

Answer 1

x^2+7x+12

what two numbers times to give 12 and add to give 7?

Answer 2

what grade are you?

Answer 3

9

Answer 4

okay so what are the factors of 12?
here's one of them (1,12) what are the others?

Answer 5

5

Answer 6

not quite so 1*12=12, 2*6=12, 3*4=12. So (1,12), (2,6), (3,4) are factors do any of these pairs add up to 7?

Answer 7

(x + 3)(x + 4)

Answer 8

perfect :D

Answer 9

Thanks

Answer 10

x^2+ 7x + 12 = x^2 + 3x + 4x + 12 ( since 7x = 3x+4x)

= x(x + 3) +4( x + 3)
Take (x +3) as common term

= (x +3)(x +4)

Therefore, Answer = ( x+3 )( x+4 )