The product of 12 - i and its conjugate is ? *Algebra?

Question

Lyndsey · Answer

12 + i

Norebal · Answer

The conjugate is 12 +i

( a + bi )( a - bi ) = a^2 + b^2

( 12 + i )( 12 - i ) = 12^2 + 1^2 = 145

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