I'm just confused about a couple of rules. For example if I have multiplied a fraction out to get 9(x+4)-2(x+2) does the 2 in the second bracket get multiplied by -2 or 2?

Also if I have this: 2(x+4)(x+2) is it only the x+4 which is doubled? Or do you work out the quadratic and multiply the whole thing by two?

Thanks