That's looks hard I have a go but I don't know what to do with that the dot in the middle of that. Sorry if it's wrong. Hopefully That helps ❤
12x-18= 6(2x−3)
X^2 - 2x - 15= (x+3)(x−5)
So the second one would be:
X^2-x-12= (x+3)(x−4)
3x^2-9x-12= 3(x+1)(x−4)
Then would you ÷ it?
So the first one :
6(2x−3) ÷ (x+3)(x−5) = 12x2−78x+90
-------------------
X+3
Then the second one:
(x+3)(x−4) ÷ 3(x+1)(x−4) =
1. -4. -13 40
-- x4+ ---- x^3 + ---- x^2 + ------ x + 16
3. 3. 3. 3