Question

factor completely

3x^2+17x+10

can someone show me how to do this?

Answer 1

(x+5) (3 x+2)

Answer 2

how did you get that

Answer 3

(x+5) (3 x+2)

Answer 4

http://www.wolframalpha.com/input/?i=factor+3x^2%2B17x%2B10

Answer 5

You can either use the quadratic formula or "guess"

(3x )(x ) u know the numbers multiply to 10 so try the factors.

Answer 6

so because there is now a 3 infront of the first x nothing changes? someone told me i had to mulitpli 3x & 10 or something ..im really confused lol

Answer 7

For the quadratic formula nothing changes u just plug in a,b,c as usual.

Answer 8

Someone probably told u a rule about multiplying to give 10 and adding to....etc.

This usually only works when a is 1.

Answer 9

3x^2+17x+10
3x^2+15x+2x+10
3x(x+5)+2(x+5)
(3x+2)(x+5)

Answer 10

That's another way, divide the 17 instead.