Question

help with rational expressions (college alg)

Answer 1

\[\frac{ \frac{ 1 }{ x }-\frac{ 1 }{ y } }{ x^2-y^2 }\]

Answer 2

factor the denominator
you know how to do that?

Answer 3

no... (xy)(x-y)???

Answer 4

\[x^2-y^2=(x+y)(x-y)\]

Answer 5

also do the subtraction in the numerator

Answer 6

i.e. compute \[\frac{1}{x}-\frac{1}{y}\]

Answer 7

\[\frac{ 1y-1x }{ xy }\]

Answer 8

right

Answer 9

although i would not put the 1's there, your teacher will think you are daft

Answer 10

so you got \[\frac{\frac{y-x}{xy}}{(x+y)(x-y)}\]

Answer 11

put the denominator in the deominator where it belongs, get \[\frac{y-x}{xy(x+y)(x-y)}\] then you can cancel

Answer 12

2y?