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OpenStudy (anonymous):
Medal Simplify. (2/7)^2 - (- 2/7) ^2 = ?
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OpenStudy (anonymous):
2^2/7^2- (-2)^2/7^2= 4/49-4/49= (4-4)/49=0
OpenStudy (anonymous):
You have to remember if the negative sign is inside the brackets (-2/7)^2 the whole expression becomes positive, so it will be 0 once you compute.
OpenStudy (anonymous):
so the answer is 0?
OpenStudy (anonymous):
yes 0
OpenStudy (anonymous):
thank you
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