Question

como resolver a conta 64x²-1=0

Answer 1

64x² - 1 = 0
64x² = 1
x² = 1/64
√x² = √1/64
x = +1/8
ou
x = -1/8

Espero ter ajudado.

Answer 2

$64 x^{2} -1=0\\\\ 64 x^{2} =1\to \\\\ x^{2} = \frac{1}{64} \to \\\\ x= \pm \sqrt{\frac{1}{64}} \to \\\\ x= \pm \frac{1}{8} \\\\\\ S=(-\frac{1}{8};\frac{1}{8})$