Answer:
[tex](x-13)(x+3)[/tex]
Step-by-step explanation:
To factor the equation, break it into two binomials which multiply to make the equation. To write these binomials (x+a)(x+b), find factors which multiply to 39 and add to -10 for a and b.
39: 1, 3, 13, 39
-13 + 3 = -10
[tex]x^2-10x-39 = (x-13)(x+3)[/tex]
