Question

I need to factor 3x^3-5x^2+9x-15

Answer 1

(3x^2 - 5)( x^2 +3)

Answer 2

How did you get that?

Answer 3

u have to kinda move them around
so its 3x^3+9x-5x^2-15

Answer 4

then you group them

Answer 5

Oh, ok

Answer 6

so the first part is 3x^3+9x which is the same as 3x(x^2+3)

Answer 7

then the second part is 5x^2-15 so its 5(x^2-3)

Answer 8

sorry that second part should be 5(x^2+3)

Answer 9

since they both have x^2+3, you combine them to make (3x-5)(x^2+3)

Answer 10

make sense?

Answer 11

From my math book, so far I have x[3(x^2)-5(x^2+3)]

Answer 12

Oops, let me re-write that, I made a mistake

Answer 13

x[3(x^2+3x)-5(x^2+3)]

Answer 14

I did that wrong too! I'm so messed up and confused, sorry

Answer 15

well for the 3(x^2+3x) you can take out another x so it can be 3x(x+3)

Answer 16

also i dont think there should be an x on the outside of the bracket

Answer 17

so does 3x(X^2+3)-5(x^2+3) look right?

Answer 18

Actually, it does!

Answer 19

good.. then ur on the right track

Answer 20

since both parts have x^2+3, you can take that term out

Answer 21

leaving (x^2+3)(3x-5)

Answer 22

which is the answer

Answer 23

Thank you so much! You ARE a lifesaver!