Helping students gain understanding and self-confidence in algebra.
Jherek2 wrote:2. add this to the numerator part
3. which gives me
4. and put this over the denominator to get
It might prove helpful to put the terms in descending order before doing the simplification:
Note: If the negation sign is, as you have posted, in front of the entire expression, then the sign between the two terms in the numerator should be additive, not subtractive.
Jherek2 wrote:so that leaves me with: My next question is how and (more importantly) WHY should it be changed to
Jherek2 wrote:If I multiply by -1 won't this also change the signs of the denominator? This always confuses me!
I can think of no particular reason, other than the author's preference. It might be wise to consult with your instructor regarding preferred preference with respect to formatting.