Calculate, in the form a+ib, where a,b∈R, the square roots of 16−30i.
My attempt with (a+ib)2=16−30i makes me get a2+b2=16 and 2ab=−30. Is this correct?
I have injection f:A→B and I want to get bijection. Can I just resting codomain to f(A)? I know that every function i...
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