If \(\phi\) is a function such that \(x\phi y=(x-y)^2\), then what will be the value of \([x\phi(x-y)]\phi[y\phi(y-x)]\)?
Explanation: বলা আছে \(x\phi y=(x-y)^2\)। সুতরাং, \([x\phi(x-y)]\phi[y\phi(y-x)] = (x-(x-y))^2 \phi (y-(y-x))^2 = (y)^2 \phi (x)^2 = (y^2-x^2)^2 = (x^2-y^2)^2\)।