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OpenStudy (anonymous):
write the expression as a complex number in standard form (5+4i)+(7+2i)
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hartnn (hartnn):
add real parts, 5+7=... ? add imaginary parts 4i+2i =.... ?
OpenStudy (anonymous):
so 13 and 6i?
hartnn (hartnn):
infact 5+7 = 12
hartnn (hartnn):
so, 12+6i
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