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OpenStudy (anonymous):
(9-2i)(3+i) simplify
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OpenStudy (anonymous):
Hint: Use Distributive law \[i^2 = -1\]
Parth (parthkohli):
Just like your algebra...just like your algebra
OpenStudy (shubhamsrg):
how about de-moiver's theorem ? just to make it interesting? ;)
OpenStudy (anonymous):
\[(9-2i)(3+i)=27+9i-6i-2i^2=27+3i+2=29+3i\]
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