Question

where do i go from,

15(5x^2-1)-(x-2)

Answer 1

What are you trying to do?

Answer 2

factor the polynomial.

Answer 3

egh. I'd start by getting it into the standard polynomial form

Answer 4

the original is, 75x^3-150x^2-15x+30

Answer 5

Ok, so factor a 15 out of everything.

Answer 6

well i do factor by grouping

Answer 7

I'd start by getting smaller numbers.

Answer 8

well thats why i broke it up into 75x^3-150x^2
abd -15x+30

Answer 9

and*

Answer 10

\[75x^3-150x^2-15x+30\]
\[= 15(5x^3 - 10x^2 - x + 2)\]

Answer 11

Then regrouping and pulling a 5x from the first two terms you should have something nice.

Answer 12

that way you would pull out a 75 and get 75x^2(x-2)15(x-2)

Answer 13

so then its (75x^2-15) and (x-2)


thenn 15(5x^2+1)(x-2)

Answer 14

\[15(5x^3 - 10x^2 - x + 2) \]
\[= 15[5x(x-2) -(x-2)]\]
\[= 15(5x-1)(x-2)\]

Answer 15

whoops i meant -1.

Answer 16

so i basically had the right answer
right?

Answer 17

Yes.

Answer 18

Mine should be
\[15[5x^2(x−2)−(x−2)]\]
\[=15(5x^2-1)(x-2)\]

Answer 19

gotcha

Answer 20

alright i will be back in a few with some more