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OpenStudy (anonymous):
For what value(s) of the variable is the expression undefined? 6/z^2+6z
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OpenStudy (anonymous):
\[6 \over z^2+6z\]
OpenStudy (saifoo.khan):
Set the denominator equal to zero. \[z^2 + 6z = 0\]
OpenStudy (anonymous):
would it be -6 or 0?
OpenStudy (saifoo.khan):
Yes!
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