12x2 + 20x - 25 IS a polynomial that factors into (2x + 5)(6x - 5)
x2-20x+100 = (x-10)(x-10) when factored
The discriminant is 0.
10 - 20x = (10) (1 - 2x)
Divide all terms by 2 and it can then be factored to (2x+1)(5x+2)
20x + 4 = 4(5x + 1)
I'm not sure if, for example, "15x3" is 15 times 3 or 15x^3. However, I can answer both questions.(15 times 3) - (20 times 2) - 5x --> 45 - 40 - 5x --> 5 - 5x. A "5" can be factored out, which will then lead to the result 5(1-x) or -5(x-1)15x^3 - 20x^2 - 5x --> 5x(3x^2 - 4x - 1) --> I think this is the farthest it can be factored. Unless you find a way to get any two numbers to be able to multiply to the number -3x^2 and add to the number -4x.
(2x + 5)(6x - 5)
(x+2)(x+18) when factored
Divide all terms by 4:- x2+5x-6 = (x-1)(x+6) when factored
Look for a common factor, shared between the two parts. Then divide both parts by this factor, to find the other factor.
It is the same as: 9+20x+20 = 20x+29