Question 1139617

{{{mx + ny=0}}}

 since sum is equal to {{{zero}}}, both products{{{ mx}}} and {{{ny}}} must be equal to {{{zero}}}

only if {{{x=0}}} and {{{y=0}}}, {{{mx + ny=0}}} will be true

{{{m*0 + n*0=0}}}
 
{{{0 + 0=0}}} 

{{{0=0}}} =>true

so, your answer is B. ({{{0}}},{{{0}}})