Question 1155004
Solve the equation 15x^3+14x^2-3x-2=0given that -1 is a zero of f(x)15x^3+14x^2-3x-2=0

where does the (x+1) come from? 


what is the best way to solve 

15x^3+14x^2-3x-2=0
<pre>{{{matrix(1,3, 15x^3 + 14x^2 - 3x - 2, "=", 0)}}}
- 1 is a ROOT, which means that x = - 1.
Setting this equation equal to 0, we get: x + 1 = 0, which means that x + 1 is a FACTOR of this polynomial.
Do you now see where x + 1 came from?
An easy- maybe not the best - method to solve this is the method that Tutor ewatrrr posted, which is long-division of a polynomial.
Synthetic division is another easy method if you're familiar with that topic.
Pay no attention to the other person's, if you want to make live easier for yourself!.