Question

Express ( 3 + 4i)² in the form ( a + ib ).

Answer 1

We have :

( 3 + 4i )²



=> 3² + (4i )² + 2 × 3 × 4i


=> ( 9 + 16i² + 24i )


=> ( 9 - 16 + 24i )


=> ( -7 + 24i ).

Answer 2

-7+24i is ans........