Răspuns:
Explicație pas cu pas:
[tex]\sqrt{4x} = 4\sqrt{3} \ \ \ ridicam \ \ la \ \ patrat\\\\(\sqrt{4x})^2 = (4\sqrt{3} )^2\\\\4x = 4^2\cdot(\sqrt{3})^2\\\\4x = 16\cdot3 \ \ \ \ impartim\ \ la\ \ 4\\\\x = 4\cdot3\\\\x = 12[/tex]
[tex] 4 \sqrt{3 } = \sqrt{4 ^{2} \times 3 } = \sqrt{48} \\ \sqrt{48 } = \sqrt{4 \times x} \\ x = 12[/tex]
