Question

If a = 1 + i, then a² equals 



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Answer 1

Step-by-step explanation:

$( {a + b})^{2} = {a}^{2} + 2ab + {b}^{2}$

$( {1}^{2} + (2 \times 1 \times i )+ {i}^{2} )$

$1 + 2i + {i}^{2}$

${a}^{2} = 1 + 2i + {i}^{2}$