Answer:
Step-by-step explanation:
First, factor all the multiplication.
(-3*3)+(-3*5i)+(5i*3)+(5i*5i)
Second, multiply.
(-9)+(-15i)+(15i)+(25[tex]i^{2}[/tex])
Third, add and solve.
i squared is -1.
-9+(-15i+15i)+(25*-1)
Fourth, subtract.
-9-25
And, you are done!
(-3+5i)(3+5i) = -34
