How do you factor the expression #x^2-x-42#?
2 Answers
Mar 22, 2018
Explanation:
Mar 22, 2018
Explanation:
The coefficient of
We are looking for an
Possible factors for
The sum has to equal -1.
We can see that the only factors with a sum of
These are the required values:
Expanding:
As required.
With practice you will quickly find the required values without having to list them all.