[tex]\sqrt{a+b}=\sqrt a +\sqrt b\\a+b=a+2\sqrt{ab}+b\\2\sqrt{ab}=0\\ab=0[/tex]
Zatem A.
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[tex]\sqrt{a+b}=\sqrt a +\sqrt b\\a+b=a+2\sqrt{ab}+b\\2\sqrt{ab}=0\\ab=0[/tex]
Zatem A.