Question

(-3 - 5i )(-3 + 5i ) = -16 34 34 - 30

Answer 1

(-3 - 5i )(-3 + 5i ) = 34 , I'm pretty sure 34 is the answer.

Answer 2

You can use:

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

We know:

`i=√(-1)\to i^2=-1`

Calculate:

`(-3-5i)(-3+5i)=(-3)^2-(5i)^2=9-25i^2=9-25(-1)=9+25=34`