36x³-60x²+3x-5 Factor the first two terms 36x³-60x² by factoring out 12x², getting 12x²(3x-5) So now you have: 12x²(3x-5)+3x-5 Factor the last two terms +3x-5 by factoring out 1, (I know that you don't normally factor out 1, but you need to anyway here, getting +1(3x-5) So now you have: 12x²(3x-5)+1(3x-5) Now you can factor out the common factor (3x-5) and the 12x² and the +1 will go in parentheses: (3x-5)(12x²+1) Edwin