Question

efeue as equações 12x²-768=0

Answer 1

$12 x^{2} -768=0\to \\\\ 12 x^{2} =768\to \\\\ x^{2} = \frac{768}{12} \to \\\\ x^{2} =64\to \\\\ x=\pm \sqrt{64} \to\\\\ x=\pm 8\\\\\\ S= \left \{ -8;8\left \}$

Answer 2

12x²-768=0
12x²= 768
x²= 768/12
x²= 64
x= raiz 64 
x= 8