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OpenStudy (anonymous):
Which is equivalent to (-2 + 4i)(7 + 2i)
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OpenStudy (anonymous):
-14-4i+28i+8i^2 -14+24i-8 -22+24i
OpenStudy (callisto):
i guess i saw the same question before?
OpenStudy (tommo_lcfc):
Expanding the brackets gives -14 + 28i - 4i + 8i^2 = -14 + 24i + 8(-1) = -14 + 24i -8 = 24i - 22 or -22 + 24i
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