anonymous
  • 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 ?)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • 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|
Directrix
  • Directrix
Here is what I think the student's error pattern is. The student thinks the negative sign on the exponent of -2 means to negate the expression of (9x) and then square just the (9x). The student is confused about what the negative sign means on an exponent. The student thinks the negative sign means subtract which it does not in this instance. So the student does this: |dw:1333152860085:dw|

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