Question

solve this maths question pls in notebook​

Answer 1

★Heya★

( a + b )³ = a³ + b³ + 3ab ( a + b )

i³ = -i

And

i² = -1

=>

( 1/3 + 3i )³ = 1/27 - 27i + 3i ( 1/3 + 3i)

=>

1/27 - 27i + i -9

=>

-242/27 - 26i