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What is (x+i)(xi)? Is it just ( x^2-1?) Or?

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  • What is (x+i)(xi)? Is it just ( x^2-1?) Or?


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Answer #1 | 02/01 2014 10:10
x^2 * i - x
Positive: 0 %
Answer #2 | 02/01 2014 10:12
(x + i)(xi) = x^2i + xi^2 = x^2i - x
Answer #3 | 02/01 2014 10:12
(x+i)(xi) = x^2 I + x I^2 I^2 = -1 x^2i - x
Positive: 0 %

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