Question

Can someone please help me? I don't understand.

Factor completely: 3x2 + 12x + 7

(3x + 1)(x + 7)

(3x + 7)(x + 1)

Prime

(3x + 4)(x + 3)

Answer 1

Please help? ;-;

Answer 2

Multiply the first coefficient (3) with the last term (7) to get 3*7 = 21

Answer 3

Now find two numbers that

a) multiply to 21

AND

b) add to 12 (the middle coefficient)

Answer 4

factoring is to find the number that when times to another number will to the end result

Answer 5

were you able to find those two numbers?

Answer 6

Wouldn't the solution be Prime?

Answer 7

yes, it turns out that there are no two whole numbers that satisfy the two conditions above at the same time

so that points tot he fact that 3x^2 + 12x + 7 can't be factored

which means it's prime

Answer 8

Thank you so much c':

Answer 9

you're welcome

Answer 10

prime would be good