Originally Posted by

**mark** hi, could anyone help me understand how to do quadratic equations. i've got the equation $\displaystyle 3x^2 - 7x + 2$ and it needs to be factorised. i was hoping someone could show me a systematic way of doing it. i read somewhere that you need to find 2 numbers that add together to make -7 and multiply together to make 2 but i don't think that applies here. the answer is $\displaystyle (x - 2) (3x - 1)$ . could someone show me a simple way of figuring it out so i don't have to resort to trial and error.

thanks, Mark