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OpenStudy (anonymous):
can anyone help me with this question please the question is (the student said (9x)-² = -81x² is the student correct ? why or why not ?)
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OpenStudy (anonymous):
I think he's wrong because that is not well written. It makes no sense.
Directrix (directrix):
The student is incorrect. |dw:1333152603972:dw|
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