Class 10 Exercise 1.2 NBF Maths Ex 1.2 multiplicative Inverse of Complex Numbers find the product of each complex number and its conjugate in Urdu Hindi Sir Nadeem Munawar maths SSC 2 class 10th maths national Book Foundation Federal board Islamabad time Codes 00:00 Q no 3 find multiplicative inverse 18:24 Q no 4 Find product of Complex no and it's conjugate