(x + 1)(x - 4)
It is: 2(a-2)
If it does not have a common factor, you cannot factorise it!
It is: (x-4)(x+4)
a + b + 4 is in its simplest form.
4(3m - 4)
-4
The expression x2 + 1x - 12 can be factored out as (x - 3)(x + 4)
12
x^2 - y^2 - 4 is in its simplest form.
(x - 4)(x^2 + 4x + 16)
The expression simplifies to: -7x-4
n-4
x2 - 9x + 20 = (x - 4)( x - 5)
4
x2 - 4 is a special expression that is referred to as a difference of squares. Whenever an expression is in the format: a2 - b2 it can be factored out as: (a + b)(a - b) In the case of x2 + 4, that would be: (x + 2)(x - 2)