In general, if then,
where are the solutions of the quadratic equation .
How would one start this factorisation?
Would you just sub in values of z until you get P(z) to equal zero? Or is there a better way to approach this problem?
I subbed in values til P(z) equals zero and I found -3 to be a root, but is there a more sophisticated way to solving this problem than just subbing in values until you get a zero?