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OpenStudy (anonymous):
-6i times 6i
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OpenStudy (mathmate):
\[-7i * 7i = (-7*7)*(i*i) = -49*(-1)=49\] so \(-6i * 6i = ?\)
OpenStudy (anonymous):
@bannemohr
OpenStudy (precal):
mathemate did a great job explaining
OpenStudy (precal):
i * i =-1
OpenStudy (precal):
you need to know this one fact and one other for complex numbers
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OpenStudy (abb0t):
i\(^2\) = -1
OpenStudy (precal):
yes same thing
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