the conjugate it's the same numbers, but the imaginary one, with the opposite sign, so will be:
(7-11i)*(7+11i)
you distribute the numbers
7*7+7*(11i)-7*(11i)-(11i)*(11i) (the bold ones, annulate each other)
[tex]49-121i^2[/tex]and i2 = -1
so 49 -121* (-1)
49+121= 170
So the answer is: 170
