It can be factored. Whether the factored form is simpler or not is a matter of opinion.sqrt( 16 - x2 ) = sqrt [ (4 + x) (4 - x) ]
(x + 6z)(x - 6z)
64-x2 = (8-x)(8+x) when factored
x3 - x2 + 2x = x*(x2 - x + 2) which cannot be factored further.
(x - 3)(x - 2)
It can be factored. Whether the factored form is simpler or not is a matter of opinion.sqrt( 16 - x2 ) = sqrt [ (4 + x) (4 - x) ]
If you mean: x2+6x+8 then it is (x+4)(x+2) when factored
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).
(x-7)2
(x + 6z)(x - 6z)
It is (x+4)(x+5) when factored
64-x2 = (8-x)(8+x) when factored
x3 - x2 + 2x = x*(x2 - x + 2) which cannot be factored further.
(x - 3)(x - 2)
If you mean x^2 -10x+16 then it is (x-2)(x-8) when factored
x2-6x+8 = (x-2)(x-4) when factored
x2 + 1 can't be factored in the real numbers. If complex numbers are acceptable, it can be factored as (x + i)(x - i).