algebra · worked example

Solve 3x² - 12 = 0

Method: isolar e extrair raiz quadrada. Verified step-by-step solution with our free AI math solver.

Problem

$3x^2 - 12 = 0$

Step-by-step solution

Some $12$ a ambos os lados: $3x^2 = 12$ .
Divida ambos os lados por $3$ : $x^2 = 4$ .
Tome as raízes quadradas positiva e negativa: $x = \pm 2$ .

Answer

$x = 2 \quad \text{or} \quad x = -2$

Want to solve a different problem? Open the quadratic solver →

Related worked examples