This factorizes simply if it were x2-11x+10. This is because (-11) squared, minus 4x1x(+10) is 81 is a perfect square. Since it doesn't factorize simply, you have to find the 2 roots given by the usual formula [11+- 4Sqrt(121+40)]/2. Call these two roots A and B. Then the factorization is (x-A)(x-B).
It is: x(x-3) factorized
x(x-7)
X2 - 4= (x + 2)(x - 2)===========
x times x times x times x times x times x = x6
What about it? Factorise it?
x + x = x(1+1)
It is: x(x-3) factorized
It could be x(1 -1) when factorised
x(x - 7)
( x - 14 ) ( x + 14 )
x(x+5)
x(x-7)
7x-x2 = x(7-x)
X(X2 - X)
-47
x2 + 4x = x(x + 4)
X=5