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Murljashka [212]
3 years ago
13

Even if I have use bidmas I'm still confuse with this equation (-7i)(2+i)+(2i)(-7i)

Mathematics
1 answer:
zheka24 [161]3 years ago
5 0
Assuming "i" is an imaginary unit:
(-7i)(2+i)+(2i)(-7i)=\\
-14i+7+14=\\
21-14i
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