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Arisa [49]
3 years ago
12

Simplify: (-1+4i)(-12-9i)

Mathematics
2 answers:
tia_tia [17]3 years ago
7 0
(-1+4i)(-12-9i)=(-1)(-12)+(-1)(-9i)+(4i)(-12)+(4i)(-9i)

= 12+9i-48i+36=48-39i
sergiy2304 [10]3 years ago
5 0
-1 (-12 - 9i) + 4i (-12 - 9i)

= 12 + 9i + -48i + 9i^2

= 9i^2 + 39i + 12
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