Question

Determinati solutiile ecuatiei: x²-16=4

Answer 1

$x^{2} =20$
$x= +-\sqrt{20}$
x₁= 2$\sqrt{5}$
x₂= - 2$\sqrt{5}$

Answer 2

$x^{2} -16=4 \\ x^{2} =4+16 \\ x^{2} =20 \\ x^{2} = \sqrt{20} \\ x_1=-2 \sqrt{5} \\ x_2=2 \sqrt{5}$