Question

Baskara de x2 +1x -2=0

Answer 1

${x}^{2} + x - 2 = 0 \\ \\ \Delta = 1 + 8 = 9 \\ \\ x = \frac{ - 1 \pm \sqrt{9} }{2} \\ x = \frac{ - 1\pm3}{2} \\ \\ x = 1 \: ou \: x = - 2$