perla713
perla713
04-03-2014
Mathematics
contestada
Simplify (7-5i)(-3+9i)-(5+6i)^2
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Mecka123
Mecka123
04-03-2014
(-21 + 63i + 15i - 45i^2) - (25 + 60i + 36i^2) =
(-21 + 78i + 45) - (-11 + 60i) =
24 + 78i - 60i + 11 =
35 + 18i
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