if the exppansion of (1+x)^m(1-x)^n ,the coefficients of x and x^2 are 3 and -6 respectively then find the value of m and n?
if the exppansion of (1+x)^m(1-x)^n ,the coefficients of x and x^2 are 3 and -6 respectively then find the value of m and n?