z1=1+2i and z2=2+3i. Find z1z2.
(a) 2+6i
(b) -4+0i
(c) -4+7i
(d) 8+7i
The question was posed to me by my college professor while I was bunking the class.
My question is from Complex Numbers-2 in division Complex Numbers and Quadratic Equations of Mathematics – Class 11