Discussion
8x2 – 18 =
*This question is included in Nova Math - Diagnostic/Review:, question #15
| (A) | 8(x2 – 2) |
| (B) | ... |
| (C) | ... |
| (D) | ... |
| (E) | ... |
| (F) | ... |
The solution is
Posted: 08/17/2012 17:30
Not really getting the step (2^2)*x^2 = |2x|^2... Can anyone explain?
Posted: 08/17/2012 17:40
Oliver, that's from the property a^2 * b^2 = (ab)^2
Posted: 08/21/2015 08:53
I solved this question by factoring out the 2, ie 2(4x^2-9) and stopped there.
Then I foil multiplied out each possible answer until I found that answer b worked.
Then I foil multiplied out each possible answer until I found that answer b worked.