ajutor va rog frumos

a. 2(-2+3i)+3(4+2i) = -4+6i+12+6i = 8+12i
b. -2+3i-2(4+2i) = -2+3i-8-4i = -10-i
c. 4(-2+3i+4+2i) = 4·(2+5i) = 8+20i