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OpenStudy (anonymous):
N
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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
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hartnn (hartnn):
did you understand ? or need further help ?
OpenStudy (anonymous):
Yes, thank you both.
hartnn (hartnn):
welcome ^_^
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