Question

4x ao quadrado-1=0 .................poderia me ajudar?

Answer 1

$4x {}^{2} - 1 = 0 \\ \\ 4x {}^{2} = 1 \\ \frac{4x {}^{2} }{4} = \frac{1}{4} \\ \\ x {}^{2} = \frac{1}{4} \\ \\ \sqrt{x {}^{2} } = ± \sqrt{ \frac{1}{4} } \\ \\ \\ x = ± \frac{1}{2}$

S={-1/2, 1/2}.