Answer: It should be ( x - 4) ( x - 1)
Step-by-step explanation:
-Solve:
[tex]x^2 - 5x +4[/tex]
[tex]a+b = -5[/tex]
[tex]ab=1[/tex] × [tex]4 = 4[/tex]
[tex]-1,-4\\-2,-2[/tex]
[tex]-1-4=-5\\-2-2=-4[/tex]
[tex]a=-4\\b=-1[/tex]
[tex](x^2-4x)+(-x+4)[/tex]
[tex]x(x-4)-(x-4)[/tex]
Result:
[tex](x-4)(x-1)[/tex]
