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just olya [345]
4 years ago
11

Helppppppppppppppppppppppppppppppppppp

Mathematics
1 answer:
12345 [234]4 years ago
3 0
Answer:
-16 + 37i

Explanation:
Note that i^2 = -1

(4+7i)(3+4i) = 4*3 + 4*4i + 7i*3 + 7i*4i
                    = 12 + 16i + 21i + 28i^2
                    = 12 + 37i + 28(-1)
                    = 12 + 37i - 28
                    = -16 + 37i

Hope this helps :)
                 
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4 0
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