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Junior Middle School Mathematics: What is the concept of "no solution"? Is the solution of the equation unable to make both sides equal?
If the linear equation of X (3m+8n)x+6=0 has no solution, then m n is (b).

A. positive number B. non-positive number C. negative number D. non-negative number

If the equation has no solution, then 3M+8N=0.

3M=-8N

So m and n cannot be both positive and negative.

So m.n= negative number.

In addition, m and n can also be 0.