Answer:
(5x + 4)(x + 7)
Step-by-step explanation:
[tex]5x^2 + 39x + 28 \\ 5x^2 + 35x + 4x + 28 \\ 5x(x + 7) + 4(x + 7) \\ (5x + 4)(x + 7)[/tex]
Step 1: Factor
[tex]5x^2 + 39x + 28[/tex]
[tex]5x^2 + 4x + 7x + 28[/tex]
[tex](5x + 4)(x + 7)[/tex]
Answer: [tex](5x + 4)(x + 7)[/tex]
