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# How do u factorise x^3 + 1 ???? watch

1. I need to take out (x+1) and can't find any way to factorise it
2. what does your other term look like when you tried to factorise
3. (Original post by _princessxox)
what does your other term look like when you tried to factorise
I tried (x+1) (x^2+x+1)
Ik it's a sign that's wrong or something
4. (Original post by chanel_666)
I tried (x+1) (x^2+x+1)
Ik it's a sign that's wrong or something
okay good it is the sign try (x+1) (x^2-x+1)
5. Use algebraic division by writing the original expression as x^3 + 0x^2 + 0x +1
6. (Original post by _princessxox)
okay good it is the sign try (x+1) (x^2-x+1)
Thanks bae
7. (Original post by EwanWest)
Use algebraic division by writing the original expression as x^3 + 0x^2 + 0x +1
Ooo I didn't think of doing this
8. (Original post by chanel_666)
Ooo I didn't think of doing this
Normally when a question wants you to factorise a cubic or higher & gives you one or more of the factors this is what it wants you to do, much quicker and you know that if you end up with a remainder then you've gone wrong somewhere
Put that equation into the calculator
Never have to solve an equation again
10. (Original post by EwanWest)
Normally when a question wants you to factorise a cubic or higher & gives you one or more of the factors this is what it wants you to do, much quicker and you know that if you end up with a remainder then you've gone wrong somewhere
thanks !!

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