Question

Help, Please!

Answer 1

\[R(r _{1} + r _{2}) = r _{1}r _{2}\]

Answer 2

Solve for: \[r _{2}\]

Answer 3

Step 1: distribute R on the left side.

Answer 4

\[Rr _{1} + Rr _{2} = r _{1}r _{2}\]

Answer 5

Now bring the term with r2 from the right side to the left side, and get rid of the term without r2 from the left side.

Answer 6

How do we do that?

Answer 7

Wait. You just need all terms with r2 on one side.
It's easier to just subtract Rr2 from both sides, so all terms with r2 will be on the right side.