factor completely

3x^2+17x+10

can someone show me how to do this?

Question

factor completely

3x^2+17x+10

can someone show me how to do this?

anonymous · Answer

(x+5) (3 x+2)

anonymous · Answer

how did you get that

anonymous · Answer

(x+5) (3 x+2)

anonymous · Answer

anonymous · Answer

You can either use the quadratic formula or "guess"

(3x    )(x       )   u know the numbers multiply to 10 so try the factors.

anonymous · Answer

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

anonymous · Answer

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

anonymous · Answer

Someone probably told u a rule about multiplying to give 10 and adding to....etc.

This usually only works when a is 1.

anonymous · Answer

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

anonymous · Answer

That's another way, divide the 17 instead.