Respuesta :

Answer:

Step-by-step explanation:

[tex]\sqrt{m+n} =\sqrt{m} +\sqrt{n} \\squaring \\m+n=m+n+2\sqrt{m} \sqrt{n} \\or~2\sqrt{m} \sqrt{n} =0\\or mn=0\\it~ is~ true~ only~ if~ m=0,or~ n=0~ or~ both~ 0\\[/tex]

so it is not true for all m and n