Question

como resolver a equacao de segundo grau 4x ao quadrado menos 36 igual a 0

Answer 1

$4x^2-36=0\\\\4x^2=36\\\\2^2x^2=6^2\\\\(2x)^2=6^2\\\\ \sqrt{(2x)^2} = \sqrt{6^2} \\\\\pm2x=6\\\\x=\frac{6}{\pm2}\\\\x=\{-3; 3\}$

Answer 2

4x² - 36 = 0        simplifica por 4
x² - 9 = 0

x² = 9
x = +/- √9

x1 = 3
x2 = -3