My sister recommended you for my exam preparation and I can confirm that she was right I have understood the concept in just few minutes, thank you sir for making maths easy for me.
There on multiplying we get different answers when we start with those numbers on the major diagonal and those on the minor diagonal eg if we start with 2x it will give the other answer so which one do we start with?
Your teaching is very precise i like that but in the 1 a, since the two terms are perfect squares ,i thought the factorisation there should be (2x-4y)(2x+4y) .or am i making mistake