Question

formula general 9x2 – 81 =0

Answer 1

Respuesta:

$9 {x}^{2} - 81 = 0$

$9 {x}^{2} = 81$

${x}^{2} = \frac{81}{9}$

$x = \sqrt{9}$

$x1 = 3 \: \: \: y \: \: \: x2 = - 3$