Discussion
Which one of the following is a solution to the equation x4 − 2x2 = −1 ?
*This question is included in Nova Math - Problem Set A: Substitution, question #14
| (A) | 0 |
| (B) | ... |
| (C) | ... |
| (D) | ... |
| (E) | ... |
| (F) | ... |
The solution is
Posted: 07/24/2012 18:59
How do you know which questions are looking for only on answer?
Posted: 07/25/2012 01:53
The question will say explicitly that there is more than one answer and you are supposed to choose multiple.
Posted: 10/31/2013 12:37
Why did you plug in 0 to the 4th power instead of just 0?
Posted: 11/01/2013 14:01
Melissa, because we are trying to find the answer to x^4 - 2x^2 = -1, so when we plug in x=0, we have to raise it to the power of 4. It's a quick calculation anyway.