Question

A=1;b=-4 é c=-2 helppp

Answer 1

Resposta:

$x = \frac{-b+\sqrt{delta} }{2a} = \frac{4+\sqrt{24} }{2}=\frac{ 4+2\sqrt{6}}{2}$

$x2 = \frac{-b-\sqrt{delta} }{2a} = \frac{4-\sqrt{24} }{2}=\frac{ 4-2\sqrt{6}}{2}$

Explicação passo a passo:

$delta = b^{2} -4ac\\delta = (-4)^{2} - 4 *(-2)*1\\delta = 16+8\\delta = 24$

$x = \frac{-b+\sqrt{delta} }{2a} = \frac{4+\sqrt{24} }{2}=\frac{ 4+2\sqrt{6}}{2}$

$x2 = \frac{-b-\sqrt{delta} }{2a} = \frac{4-\sqrt{24} }{2}=\frac{ 4-2\sqrt{6}}{2}$