freyaenriquez
Answered

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

Sagot :

konrad509
Assuming "i" is an imaginary unit:
[tex] (-7i)(2+i)+(2i)(-7i)=\\ -14i+7+14=\\ 21-14i[/tex]
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