||'''Book'''|| Advanced Engineering Mathematics ||
 ||'''Author'''|| Erwin Kreyszig ||
 ||'''Edition'''|| 8th Edition ||

/* code_begins */

{{{
var ('z1,z2')
z1 = 4-6*i
z2 = 2+2.5*i
abs(z1*z2)
23.0867927612304
abs(z1) * abs(z2)
6.40312423743285*3.60555128
23.0867927902750
}}}

/* code_ends */

 * '''Solution by''': 
   * sampath reddy, student, VREC
   * sajith kumar, student, vnrvjit