Given: (M & # 178; + n & # 178;) (M & # 178; + n & # 178; - 9) = 0, find the value of the algebraic formula M & # 178; + n & # 178;)

Given: (M & # 178; + n & # 178;) (M & # 178; + n & # 178; - 9) = 0, find the value of the algebraic formula M & # 178; + n & # 178;)

Because (M & # 178; + n & # 178;) (M & # 178; + n & # 178; - 9) = 0
So (M & # 178; + n & # 178;) = 0 or (M & # 178; + n & # 178; - 9) = 0
So M & # 178; + n & # 178; = 0 or 9