Question 279798
You didn't give an example, so use
{{{(a + bi)^2}}}
= {{{a^2 + 2abi - b^2}}}
= {{{a^2-b^2 + 2abi}}}
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{{{(3 + 4i)^2}}}
= {{{9 - 16 + 24i}}}
= -7 + 24i