Question

Solve using formula.
$5m^2-4m-2=0$.

Answer 1

$5m^2-4m-2=0$

$a=5,b=-4,c=-2$

$m=\frac{-b\pm \sqrt{b^2-4ac}}{2a}$

$m=\frac{-(-4)\pm \sqrt{{(-4)}^2-4\cdot 5(-2)}}{2\cdot 5}$

$=\frac{4\pm \sqrt{56}}{10}$

$m=\frac{2\pm \sqrt{14}}{5}$