Question

okay.. simplify this.. r/r-1 - r²/r² .... good luck lol

Answer 1

well, r^2/r^2 = 1

Answer 2

r/r-1 - 1
r-r-1/r-1
-1/r-1

Answer 3

r/r-1 - r²/r²
r²/r²=1
(r/r-1)-1
(r/r-1)-(r-1/r-1)
r-r-1/r-1
-1/r-1

Answer 4

where did the second r come from din?

Answer 5

\[\frac{r}{r-1} - 1 = \frac{r}{r-1} -\frac{r-1}{r-1} = \frac{r-(r-1)}{r-1} = \frac{1}{r-1}\]

Answer 6

I'm sorry, how are you getting r-1/r-1?

Answer 7

just adding it, but because it equals 1 it doesn't change expression's value

Answer 8

ooo

Answer 9

thats the only way to combine fractions, get a common denominator

Answer 10

hmm

Answer 11

thanks for your explanations dumbcow.

Answer 12

no problem, thats how you learn
thanks for wanting them :)