Write the complex conjugate of the complex number Then multi

Write the complex conjugate of the complex number. Then multiply the original number by its complex conjugate. -1-i the square root of 6

Solution

Z = -1 -isqrt6

Now for z = a+ib Its complex conjugate z bar = a -ib

So, complex conjugate of z = -1 -isqrt6 i ius z bar = -1 + isqrt6

multiply the original number by its complex conjugate = ( -1 - isqrt6)( -1 +isqrt6)

=1 - (i*sqrt6)^2

= 1 +6

= 7