Question

Adding and subtracting expressions for Algebra 2. We have the answers but we have no idea how to solve it.

Answer 1

please for give me I am trying to see how to use this site

Answer 2

in order to add or subtract fractions you need to have a common denominator

\[\frac{ y }{ 2y+4 }-\frac{ 3 }{ y+2 }\] (y + 2) * 2 = 2y + 4

\[\frac{ y }{ 2y+4 }-\frac{ 3 }{ y+2 } * \frac{ 2 }{2 }\]

Answer 3

\[\frac{ y }{ 2y + 4 } - \frac{ 3 }{ y + 2 }\]
Multiply the right hand side by 2 to get the same denominator and be able to subtract them.
\[\frac{ y }{ 2y + 4 } - \frac{ 2(3) }{ 2(y + 2) }\]
\[\frac{ y }{ 2y + 4 } - \frac{ 6 }{ 2y + 4 }\]
\[\frac{ y - 6 }{ 2y + 4 } \]