- #1
NewtonianAlch
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Homework Statement
Factorise z[itex]^{8}[/itex] -15z[itex]^{4}[/itex] - 16 over the Complex numbers and Real numbers
The Attempt at a Solution
I factorised over the complex numbers, I'm not sure what they mean by over the real numbers.
Do I substitute z = (x + iy) and then do it by expanding and separating real from complex? I would have tried it at first, except these are powers to the 8, which seems like an unlikely method.