For natural numbers m, n if (1-y)^(m)(1+...

For natural numbers m, n if `(1-y)^(m)(1+y)^(n) = 1+a_(1)y+a_(2)y^(2) + "……."` and `a_(1) = a_(2) = 10`, then `(m,n)` is :

(35, 45)

(20, 45)

(35, 20)

(45, 35)

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