Question

resolva a equação no conjunto R
16x(elevado ao 2) -1=0 ???

Answer 1

16x² - 1 = 0
16x² = 1
  x² = 1/16
  x = √(1/16) ---> x = 1/4

Answer 2

$16x^2-1=0 \\\\ 16x^2=1 \\\\ x^2= \frac{1}{16} \\\\ x= \sqrt{ \frac{1}{16} } \\\\ x= \pm \frac{1}{4} \\\\\\ \boxed{S=\{ -\frac{1}{4}, \frac{1}{4}\}}$