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OpenStudy (renaekailee00):
Please help!!! I know the answer is -80 I just don't know how to get there!!!! (3 + 7i)2 + (3 − 7i)2
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OpenStudy (triciaal):
remember i^2 is equal to negative one
OpenStudy (mrnood):
take each bracket and expand it using (a+b)^2 = a^2 +2ab + b^2
OpenStudy (triciaal):
|dw:1475969142293:dw|
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