I really don't understand how they factorise this:
y^4+y^2+1
Can anyone lend me a hand?
where you're going to use z^2+z+1 to solve the equation.
@prove it:
I only was able to solve it through the calculator and it's factorisable, but I wanted to know the method. The answer was [LaTeX ERROR: Convert failed] . A friend told me to use another equation similar to it which made it more confusing.