Question

Descompuneti expresia $x^{2}+4-5x$

Answer 1

=x²  -  x - 4x + 4 
= x ·( x -1)  - 4( x -1) 
= ( x -1) ·( x -4) 

Answer 2

x²-5x+4=x²-4x-x+4=
=x(x-4)-(x-4)=
=(x-1)(x-4)