Question

Equações segundo Grau​

Answer 1

$2x^2-7=7(x-1)+2x$

$2x^2-7=7x-7+2x$

$2x^2-7x-2x-7+7=0$

$2x^2-9x=0$

$x(2x-9)=0$

$x_1=0$

$2x_2-9=0$

$2x_2=9$

$x_2=\frac{9}{2}$

$S=\{0,\ \frac{9}{2}\}$