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# How do you factorise this completely? watch

1. Could you show me how its done?

x^3+x^2-6x ?

Could you show the steps as well I got x(x+3)(x-2) however when check i expand i get something different.
2. (Original post by bobjon22444)

I got x(x+3)(x-2).
this is exactly right
3. I think the answer is x(x^2+x-6), this is because everything in the brackets is being multiplied by the outside. The common factor here is x and,

x(x^2)=x^3

x(x)=x^2

x(-6)=-6x

=x^3+x^2-6x
4. (Original post by Black Magic)
I think the answer is x(x^2+x-6), this is because everything in the brackets is being multiplied by the outside. The common factor here is x and,

x(x^2)=x^3

x(x)=x^2

x(-6)=-6x

=x^3+x^2-6x
...it clearly says completely.

How do you factorise the quadratic x^2 + x - 6?
5. (Original post by Zacken)
...it clearly says completely.

How do you factorise the quadratic x^2 + x - 6?
True. I am no maths expert but my answer is what I would do. I think you are probably correct.
6. (Original post by the bear)
this is exactly right
I know but when I expand to check I get x^4+6x-6... Is there a different way to check if you get factorising right?
7. (Original post by bobjon22444)
Could you show me how its done?

x^3+x^2-6x ?

Could you show the steps as well I got x(x+3)(x-2) however when check i expand i get something different.
(Original post by bobjon22444)
I know but when I expand to check I get x^4+6x-6... Is there a different way to check if you get factorising right?

(Original post by Black Magic)
True. I am no maths expert but my answer is what I would do. I think you are probably correct.
8. (Original post by Zacken)

Wait what are those dots ?
9. (Original post by bobjon22444)
Wait what are those dots ?
Multiplication, I'll edit it and use the times symbol instead.

Edited: is that any better?
10. (Original post by bobjon22444)
Wait what are those dots ?
Do you know how to expand brackets

11. (Original post by bobjon22444)
Could you show me how its done?

x^3+x^2-6x ?

Could you show the steps as well I got x(x+3)(x-2) however when check i expand i get something different.
x(x^2+x-6)... Find the common factor
x(x+3)(x-2)... Factorise the quadratic in the bracket.

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12. (Original post by Zacken)
Do you know how to expand brackets

I see thank you very much. Maths is starting to make a lot more sense.
13. (Original post by bobjon22444)
I see thank you very much. Maths is starting to make a lot more sense.
Great! Glad I could help. :-)

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