Solve 4x^(2)-5x-12=666

Evaluate

4 x^{2} - 5 x - 12 = 666

Move the expression to the left side

4 x^{2} - 5 x - 678 = 0

Substitute a= 4,b= - 5 and c= - 678 into the quadratic formula x = \frac{- b \pm b ^{2} - 4 a c}{2 a}

x = \frac{5 \pm ( - 5 ) ^{2} - 4 \times 4 ( - 678 )}{2 \times 4}

Simplify the expression

x = \frac{5 \pm ( - 5 ) ^{2} - 4 \times 4 ( - 678 )}{8}

Simplify the expression

More Steps

x = \frac{5 \pm 10873}{8}

Separate the equation into 2 possible cases

x = \frac{5 + 10873}{8} x = \frac{5 - 10873}{8}

Solution

x_{1} = \frac{5 - 10873}{8}, x_{2} = \frac{5 + 10873}{8}

Alternative Form

x_{1} \approx - 12.40921, x_{2} \approx 13.65921

Solve the quadratic equation