Question

3x² - 5x - 12= 0 solve this quadratic equation​

Answer 1

Step-by-step explanation:

$3 {x}^{2} - 5 - 12 = 0\\ 3 {x}^{2} - 9x + 4x - 12 = 0\\ 3x(x - 3) + 4(x - 3) = 0\\ ( x - 3)(3x + 4) = 0 \\ x - 3 = 0 \: \: \: \: or \: 3x + 4 = 0 \\ x = 3 \: \: or \: \: x = - 4 \div 3$