Answer:
(r-7)(r+2)
Step-by-step explanation:
First, let's look at the -14. Possible factors for that number are (-2, 7) (2, -7) (1, -14) and (-1, 14).
Now, let's look at the -5. How can we make -5 with the pairs that we just found?
The only possible way is 2 and -7 (added together equals -5)
Answer:
r^2-5r-14
r^2-(7-2)r-14
r^2 -7r+2r-14
taking common from each 2 terms
r(r-7)+2(r-7)
(r-7)(r+2)
Step-by-step explanation:
