Final answer:
The product of z and w is -160 + 40i.
Step-by-step explanation:
To find the product of z and w, we multiply the real parts and the imaginary parts separately.
The real part of z is -20 and the real part of w is 8. So, the product of the real parts is (-20)*(8) = -160.
The imaginary part of z is 10i and the imaginary part of w is -4i. So, the product of the imaginary parts is (10i)*(-4i) = -40i^2 = 40.
Therefore, the product of z and w is -160 + 40i.