Answer:
[tex](x+4)(x+1)[/tex]
Step-by-step explanation:
the formula is
[tex](x+a)(x+b)=x^{2}+(a+b)x+ab[/tex]
so
a+b=5
ab=4
so the possible values are
a=1 b=4
a=4 b=1
we have
[tex](x+4)(x+1)\\\\(x+1)(x+4)[/tex]
it's the same
so the factor
[tex](x+4)(x+1)[/tex]
