Question

x
${x}^{2} - 4x - 12 = 0$
4x - 12 = 0

Answer 1

$\mathsf{\Delta=b^2-4ac}$

16 -4*-12

8²

$\mathsf{x = \frac{-b \pm \sqrt{\Delta} }{2a}}$

4 ± 8/2

2 ± 4

{6 , -2}

4x -12 = 0

x = 12/4

x = 3