Question

resolver equação de 2 graus, sem Bhaskara.
como: 3x2 - 75 = 0

Answer 1

3x² - 75 = 0
3x² = 75
x² = 75 / 3
x² = 25
x = ± √25
x = ± 5
S = {-5, 5}

Espero ter ajudado. Valeu!

Answer 2

$3x^2-75=0\to\\\\ 3x^2=75\to\\\\ x^2= \frac{75}{3} \to\\\\ x^2=25\to\\\\ x=\pm \sqrt{25} \to \\\\ x=\pm5\\\\\\ S=\{-5;5\}$