a + b + 4 is in its simplest form.
X(5-8)
8(7c - 5d)
ab(a - b)
It is already in its simplest form as 49/72
(x-7)2
You can convert standard form to factored form by using a factoring tree to convert to the long-form factored format. You can also work backwards to convert from factored to standard form.
You can't know if a general polynomial is in factored form.
3y-6y in factored form = -3
56
252-70x+49 = (5x-7)(5x-7) when factored
I factored the other 49.
A completely factored form is one which is composed of product of factors and can't be factorized further. Let us consider two examples: x2 - 4x + 4 is not a factored form because it can be factored as (x - 2)(x - 2). (x +1)(x2 - 4x + 4) is also not a factored form because x2 - 4x + 4 can be factored further as (x - 2)(x - 2). So, the completely factored form is (x + 1)(x - 2)(x - 2).
x4-49 is the difference of two squares when factored as (x2-7)(x2+7)
It is: (x-7)(x+7) when factored
x2+14x+49 = (x+7)(x+7) when factored
2(a+b) is 2a plus 2b in factored form.