Question

Solutia ecuatiei x supra 2 =8,x € R este?
Va rog dau coroanaa​

Answer 1

Răspuns:

$x^2=8,8 > 0\\\sqrt{x^2} =\sqrt{8} =>IxI=\sqrt{4*2} =>IxI=\sqrt{4} *\sqrt{2} =>IxI=2\sqrt{2} \\\\\S=-2\sqrt{2} ,2\sqrt{2}$