For this case we have the following polynomial:
[tex]a ^ 2 - a - 20[/tex]
We must factor the polynomial.
To do this we look for two numbers that are added equal to -1 and multiplied equal to -20.
Factoring we have:
[tex]a ^ 2 - a - 20 = (a-5) (a + 4)[/tex]
Answer:
The factored expression is given by:
[tex]a ^ 2 - a - 20 = (a-5) (a + 4)[/tex]
