Question

dada a função f(x)=1/4x² - 1/64 determine os zeros

Answer 1

$\frac{1}{4 x^{2} }- \frac{1}{64}=0 \\ \\ \frac{1}{4 x^{2} }= \frac{1}{64} \\ \\ \frac{1}{ x^{2} }= \frac{4}{64} \\ \\ \frac{1}{ x^{2} }= \frac{1}{16} \\ \\ x^{2} =16 \\ \\ x=-4 ou x = 4$