Question

(m-n)+(m+n)=?
please help me​

Answer 1

(m-n)+(m+n) = m2-n2

m square - n square

Answer 2

Step-by-step explanation:

= (m - n) + (m + n)

= m - n + m + n

= m + m - n + n

(In n, if one is plus one is minus then it has been cutted)

So now,

= m + m

= 2m

Ans is 2m