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Mathematics 18 Online
OpenStudy (anonymous):

I'll fan & medal!! Find the sum.

OpenStudy (anonymous):

\[\frac{ 5 }{ xy } + \frac{ x ^{2} }{ y ^{2}}\]

OpenStudy (danjs):

you can only add fractions if they have the same bottom denominators, so need to do something , mulitply by the common denominator first...

OpenStudy (anonymous):

the common denominator is xy^2

OpenStudy (danjs):

\[[\frac{ 5 }{ xy }+\frac{ x^2 }{ y^2 }]*\frac{ xy^3 }{ xy^3 }\]

OpenStudy (anonymous):

5x^2 is the numerator?

OpenStudy (anonymous):

|dw:1437497964405:dw|

OpenStudy (danjs):

The common denominator is the product of the two, then multiply by that over itself, the same as multiplying by 1...

OpenStudy (anonymous):

i dont gt it

OpenStudy (danjs):

\[[\frac{ 5 }{ xy }+\frac{ x^2 }{ y^2 }]*\frac{ xy^3 }{ xy^3 } = \frac{ 5y^2 }{ xy^3 }+\frac{ x^3 y}{ xy^3 } =\]

OpenStudy (danjs):

now you can add them since they are both over xy^3

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