- #1
alpha01
- 77
- 0
[SOLVED] yet another simple factorizing question..
I won't re-write the full question, just one line on the numerator:
from the solutions, (a + 1)^2 − (a − 1)^2 factorizes to:
((a + 1) − (a − 1))((a + 1) + (a − 1))
I can see that this is just another form of:
(a + 1)(a + 1) - (a - 1)(a - 1)
but why is the former, and not the later used?
does it make it easier to go to the next step to complete factorization process?
If so please explain why.
I won't re-write the full question, just one line on the numerator:
from the solutions, (a + 1)^2 − (a − 1)^2 factorizes to:
((a + 1) − (a − 1))((a + 1) + (a − 1))
I can see that this is just another form of:
(a + 1)(a + 1) - (a - 1)(a - 1)
but why is the former, and not the later used?
does it make it easier to go to the next step to complete factorization process?
If so please explain why.