Question

2x в квадрате -x-6=0

Answer 1

2x²-x-6=0
D=b²-4ac=1-4*2*(-6)=1+48=$\sqrt{49}$=7

x₁=$\frac{1+7}{2*2} = \frac{8}{4} =2$

x₂=$\frac{1-7}{2*2} = - \frac{6}{4} = - \frac{3}{2} = -1,5$

Answer 2

$2 x^{2} -x-6=0$
Д=49
$x1,2= \frac{1±7}{4}$
$x1=2 x2=-1,5$