How do you factorise #2x^3-5x+x+2#?
2 Answers
I find it best to look at the polynomial is the following form:
Explanation:
The best way is by long division. However, finding a factor of this polynomial is difficult.
...
After some trial and error, you will realise that
Therefore mathematically:
I hope this helps!
Demonstrating long division
Explanation:
Given that it is determined that
Giving
Using place keepers of 0 value. Example
Then we have:
Putting it all together:
If you wished to take the quadratic 'down' further you would use the formula.