Question

como resolver a conta -25+100x²=0?

Answer 1

(100x^2)-25 = 0
100x^2 = 25
X^2 = 25/100
X = raiz de (25/100)
X = 5/10 ou 0,5

Answer 2

$-25+100 x^{2} =0\\\\ 100 x^{2} =25\to \\\\ x^{2} = \frac{25}{100} \to \\\\ x= \pm \sqrt{\frac{25}{100}} \to \\\\ x= \pm \frac{5}{10}\to \\\\ x= \pm \frac{1}{2} \\\\\\ S=(-\frac{1}{2};\frac{1}{2})$