Question

How does 1/B-1/A = AB/A-B?

Answer 1

@dan815 @DLS

Answer 2

\[\frac{ 1 }{ \frac{ 1 }{ b } -\frac{ 1 }{ a }}=\frac{ ab }{ a-b }\]

Answer 3

But why do you put them over 1?

Answer 4

that one you posted is incorrect\[\frac{ 1 }{ b }-\frac{ 1 }{ a}=\frac{ a-b }{ ab } \]

Answer 5

Thank you! Missed that!

Answer 6

@Jonask , why did you put it all over1?

Answer 7

well to make it equivalent to your result otherwise it wont work if you just leave it like that its not true
\[\huge \frac{ a }{ b }+\frac{ c }{ d }=\frac{ ad+bc }{ bd }\]

Answer 8

Will you please also show me the steps for 1/b-1/a = a-b/ab? I need to see how you got it?

Answer 9

Thanks so much.

Answer 10

Nvm, you just did. God bless.