I'm doing my homework and these are a few I need help with. 1) a^2 - 416 = 0 a= or a= 2) (4+7i)(3+2i) 3) (5i)^3 4) (-5+5i) + (7-7i)

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Originally Posted by knowledgekick I'm doing my homework and these are a few I need help with. 1) a^2 - 416 = 0 for simplification purposes, note that 2) (4+7i)(3+2i) multiply it out ... remember that 3) (5i)^3 hint ... 4) (-5+5i) + (7-7i) just combine like terms for this one ...