The possible values for
What we have to do is, somehow, come up with an equation that resembles
first lets make it so one side equals zero:
Now, we can factor out one
So, for any multiplication to be equal to zero, one of the terms is equal to zero. That leaves us with the two following conditions:
Now we take our
Note : This is not a quadratic equation, a quadratic equation is of degree 2. Since this equation is of degree 3, it is correct to say that it is a cubic equation.
To factor, or factorise means to write an expression as the product of its prime factors.
There are several ways to factorise:
- divide out a common factor
- divide out a common bracket
- grouping terms
- quadratic trinomial
- difference of squares
Move all the terms to one side and make the other side
Find factors of
The signs will be different, the bigger is negative.
Set each factor equal to zero:
These are the 3 possible solutions.