Answer:
a.) [tex](x-10)(x+4)[/tex]
Step-by-step explanation:
[tex]x^2-6x-40[/tex]
Find two numbers that add up to -6 and multiply to -40 (you will most likely need a negative and a positive because -40):
-10 and 4
Factor:
[tex](x-10)(x+4)[/tex]
Finito.
