31x^2-49x-60=0

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Solution for 31x^2-49x-60=0 equation:


Simplifying
31x2 + -49x + -60 = 0

Reorder the terms:
-60 + -49x + 31x2 = 0

Solving
-60 + -49x + 31x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
31 the coefficient of the squared term: 

Divide each side by '31'.
-1.935483871 + -1.580645161x + x2 = 0

Move the constant term to the right:

Add '1.935483871' to each side of the equation.
-1.935483871 + -1.580645161x + 1.935483871 + x2 = 0 + 1.935483871

Reorder the terms:
-1.935483871 + 1.935483871 + -1.580645161x + x2 = 0 + 1.935483871

Combine like terms: -1.935483871 + 1.935483871 = 0.000000000
0.000000000 + -1.580645161x + x2 = 0 + 1.935483871
-1.580645161x + x2 = 0 + 1.935483871

Combine like terms: 0 + 1.935483871 = 1.935483871
-1.580645161x + x2 = 1.935483871

The x term is -1.580645161x.  Take half its coefficient (-0.7903225805).
Square it (0.6246097812) and add it to both sides.

Add '0.6246097812' to each side of the equation.
-1.580645161x + 0.6246097812 + x2 = 1.935483871 + 0.6246097812

Reorder the terms:
0.6246097812 + -1.580645161x + x2 = 1.935483871 + 0.6246097812

Combine like terms: 1.935483871 + 0.6246097812 = 2.5600936522
0.6246097812 + -1.580645161x + x2 = 2.5600936522

Factor a perfect square on the left side:
(x + -0.7903225805)(x + -0.7903225805) = 2.5600936522

Calculate the square root of the right side: 1.600029266

Break this problem into two subproblems by setting 
(x + -0.7903225805) equal to 1.600029266 and -1.600029266.

Subproblem 1

x + -0.7903225805 = 1.600029266 Simplifying x + -0.7903225805 = 1.600029266 Reorder the terms: -0.7903225805 + x = 1.600029266 Solving -0.7903225805 + x = 1.600029266 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.7903225805' to each side of the equation. -0.7903225805 + 0.7903225805 + x = 1.600029266 + 0.7903225805 Combine like terms: -0.7903225805 + 0.7903225805 = 0.0000000000 0.0000000000 + x = 1.600029266 + 0.7903225805 x = 1.600029266 + 0.7903225805 Combine like terms: 1.600029266 + 0.7903225805 = 2.3903518465 x = 2.3903518465 Simplifying x = 2.3903518465

Subproblem 2

x + -0.7903225805 = -1.600029266 Simplifying x + -0.7903225805 = -1.600029266 Reorder the terms: -0.7903225805 + x = -1.600029266 Solving -0.7903225805 + x = -1.600029266 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.7903225805' to each side of the equation. -0.7903225805 + 0.7903225805 + x = -1.600029266 + 0.7903225805 Combine like terms: -0.7903225805 + 0.7903225805 = 0.0000000000 0.0000000000 + x = -1.600029266 + 0.7903225805 x = -1.600029266 + 0.7903225805 Combine like terms: -1.600029266 + 0.7903225805 = -0.8097066855 x = -0.8097066855 Simplifying x = -0.8097066855

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.3903518465, -0.8097066855}

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