Question

everytime i m getting 192 as the ans but the correct ans is 400 how?
explain and tell me where i had done a mistake !!

Answer 1

the mistake is u are writing (a+b)^2 as a^2 + b^2

{ (27)^2/3 + (111)^1/2 }^2

so change here

Answer 2

([23 + 4)^2/3 + (111)^1/2]^2.

= > [(27)^2/3 + (111)^1/2]^2

As u can see, the 140 - 29 = 111 which is not a perfect square. There is a printing mistake in your question. Your question should be 140 - 19 (or) 150 - 29.