Question

conta da equação x² + 2× + -2 = 0​

Answer 1

Resposta:

$x^{2} +2x-2=0\\\\\frac{-b+-\sqrt{(b)^{2}-4ac}}{2a} \\\frac{-2+-\sqrt{(2)^{2}-4.1.-2}}{2.1} \\\frac{-2+-\sqrt{4+8}}{2}\\\frac{-2+-\sqrt{12}}{2}\\\frac{-2+-3\sqrt{2}}{2}\\\\x' = \frac{-2+3\sqrt{2}}{2}= -1+3\sqrt{2}}\\x'' =\frac{-2-3\sqrt{2}}{2} = -1-3\sqrt{2}$

Espero ter ajudado.