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OpenStudy (anonymous):
http://goo.gl/tLtisB i got a+3/5(a+3)^2 is it right?
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OpenStudy (aum):
\[
\frac{(a+3)^2}{(a-3)} \div \frac{5}{(a^2-9)} =
\frac{(a+3)^2}{(a-3)} \times \frac{(a^2-9)}{5} =
\frac{(a+3)^2}{(a-3)} \times \frac{((a+3)(a-3))}{5} = \\
\frac{(a+3)^3}{5}
\]
OpenStudy (aum):
\(a^2-9 = a^2 - 3^2 = (a+3)(a-3)\)
OpenStudy (anonymous):
where did u get the exponent 3?
OpenStudy (aum):
\(\large (a+3)^2 \times (a+3) = (a+3)^3\)
OpenStudy (anonymous):
ohhh...right. thank you very much. could you help me with another one? its rly complicated
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OpenStudy (aum):
go ahead.
OpenStudy (aum):
\[\large
\frac{xy+xz}{xz-z^2} \times \frac{xy-yz}{xz+yz} \div \frac{y^2+yz}{x^2+xy} = \\ \large
\frac{x(y+z)}{z(x-z)} \times \frac{y(x-z)}{z(x+y)} \times \frac{x(x+y)}{y(y+z)} = ?
\]Can you simplify now?
OpenStudy (anonymous):
is it x^2 y /z^2y ?
OpenStudy (aum):
Almost there. You can simplify further.
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OpenStudy (anonymous):
do i cancel the y's? to make it x^2/z^2
OpenStudy (aum):
Yes!
OpenStudy (anonymous):
yaaaaaayyyyy thanks that helped
OpenStudy (aum):
You are welcome.
OpenStudy (anonymous):
:D
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