Solve 5x^2-8x-2=0

Evaluate

5 x^{2} - 8 x - 2 = 0

Substitute a= 5,b= - 8 and c= - 2 into the quadratic formula x = \frac{- b \pm b ^{2} - 4 a c}{2 a}

x = \frac{8 \pm ( - 8 ) ^{2} - 4 \times 5 ( - 2 )}{2 \times 5}

Simplify the expression

x = \frac{8 \pm ( - 8 ) ^{2} - 4 \times 5 ( - 2 )}{10}

Simplify the expression

More Steps

x = \frac{8 \pm 104}{10}

Simplify the radical expression

More Steps

x = \frac{8 \pm 2 26}{10}

Separate the equation into 2 possible cases

x = \frac{8 + 2 26}{10} x = \frac{8 - 2 26}{10}

Simplify the expression

More Steps

x = \frac{4 + 26}{5} x = \frac{8 - 2 26}{10}

Simplify the expression

More Steps

x = \frac{4 + 26}{5} x = \frac{4 - 26}{5}

Solution

x_{1} = \frac{4 - 26}{5}, x_{2} = \frac{4 + 26}{5}

Alternative Form

x_{1} \approx - 0.219804, x_{2} \approx 1.819804

Solve the quadratic equation