Answer:
[tex]4x(x+5)[/tex]
Step-by-step explanation:
[tex]4x^2 + 20x[/tex]
The highest common factor of the expression is [tex]4x[/tex]
[tex]4x(x)+4x(5)[/tex]
[tex]4x(x + 5)[/tex]
[tex]4 {x}^{2} + 20x \\ 4x(x + 5)[/tex]
