2ma+2mb+a+b=a(2m+1)+b(2m+1)=(2m+1)(a+b)
2m(a+b) + a+ b =2m(a+b) +( a+ b) =2m(a+b) +1( a+ b)= (2m + 1 )(a + b)
2ma+2mb+a+b=a(2m+1)+b(2m+1)=(2m+1)(a+b)
2m(a+b) + a+ b =2m(a+b) +( a+ b) =2m(a+b) +1( a+ b)= (2m + 1 )(a + b)