Question

Factor completely: 3x2 + 5x + 1

(3x + 1)(x + 1)

(3x + 5)(x + 1)

(3x − 5)(x + 1)

Prime

Answer 1

this expression is not factorable

Answer 2

so it would be prime???

Answer 3

yes! but more importantly, do you understand why?

Answer 4

i think so

Answer 5

there are no 2 numbers that add up to 5 and multiply to 3

Answer 6

is it because 3*3=9
so leaving you with 9x + 5x + 1
and 5 is your odd number in the equation which make the equation nonfactorable

Answer 7

nope, thats not how you do it! when you factor in the form ax^2 + bx +c, you have to find two numbers that multiply to a*c and add up to b. So if those number dont exist, its not factorable.
ex. 3x^2 + 5x + 1
a = 3, b =5, c = 1
a*c = 3
b = 5

what numbers multiply to 3? list the factors: 1,3 -- thats it
1 + 3 = 4. 4/=5! therefore, not factorable

Answer 8

oh ok thank you for the help