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Mathematics 7 Online
OpenStudy (anonymous):

N

hartnn (hartnn):

can you foil ?

hartnn (hartnn):

do you know what 'i' is ?

OpenStudy (anonymous):

Yes, so I just foil right?

OpenStudy (anonymous):

ty!!

OpenStudy (anonymous):

Assume i is imaginary number, \[i^{2}=-1\] ; After using FOIL, 20-7i-6i^2. Substitute i^2 into that equation. Answer: 26-7i

hartnn (hartnn):

did you understand ? or need further help ?

OpenStudy (anonymous):

Yes, thank you both.

hartnn (hartnn):

welcome ^_^

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