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Determinati solutiile ecuatiei: x²-16=4

Răspuns :

[tex] x^{2} =20[/tex]
[tex]x= +-\sqrt{20} [/tex]
x₁= 2[tex] \sqrt{5} [/tex]
x₂= - 2[tex] \sqrt{5} [/tex]
[tex] x^{2} -16=4 \\ x^{2} =4+16 \\ x^{2} =20 \\ x^{2} = \sqrt{20} \\ x_1=-2 \sqrt{5} \\ x_2=2 \sqrt{5}[/tex]