0.99x^2-x-60=0

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Solution for 0.99x^2-x-60=0 equation:


Simplifying
0.99x2 + -1x + -60 = 0

Reorder the terms:
-60 + -1x + 0.99x2 = 0

Solving
-60 + -1x + 0.99x2 = 0

Solving for variable 'x'.

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

Divide each side by '0.99'.
-60.60606061 + -1.01010101x + x2 = 0

Move the constant term to the right:

Add '60.60606061' to each side of the equation.
-60.60606061 + -1.01010101x + 60.60606061 + x2 = 0 + 60.60606061

Reorder the terms:
-60.60606061 + 60.60606061 + -1.01010101x + x2 = 0 + 60.60606061

Combine like terms: -60.60606061 + 60.60606061 = 0.00000000
0.00000000 + -1.01010101x + x2 = 0 + 60.60606061
-1.01010101x + x2 = 0 + 60.60606061

Combine like terms: 0 + 60.60606061 = 60.60606061
-1.01010101x + x2 = 60.60606061

The x term is -1.01010101x.  Take half its coefficient (-0.505050505).
Square it (0.2550760126) and add it to both sides.

Add '0.2550760126' to each side of the equation.
-1.01010101x + 0.2550760126 + x2 = 60.60606061 + 0.2550760126

Reorder the terms:
0.2550760126 + -1.01010101x + x2 = 60.60606061 + 0.2550760126

Combine like terms: 60.60606061 + 0.2550760126 = 60.8611366226
0.2550760126 + -1.01010101x + x2 = 60.8611366226

Factor a perfect square on the left side:
(x + -0.505050505)(x + -0.505050505) = 60.8611366226

Calculate the square root of the right side: 7.801354794

Break this problem into two subproblems by setting 
(x + -0.505050505) equal to 7.801354794 and -7.801354794.

Subproblem 1

x + -0.505050505 = 7.801354794 Simplifying x + -0.505050505 = 7.801354794 Reorder the terms: -0.505050505 + x = 7.801354794 Solving -0.505050505 + x = 7.801354794 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.505050505' to each side of the equation. -0.505050505 + 0.505050505 + x = 7.801354794 + 0.505050505 Combine like terms: -0.505050505 + 0.505050505 = 0.000000000 0.000000000 + x = 7.801354794 + 0.505050505 x = 7.801354794 + 0.505050505 Combine like terms: 7.801354794 + 0.505050505 = 8.306405299 x = 8.306405299 Simplifying x = 8.306405299

Subproblem 2

x + -0.505050505 = -7.801354794 Simplifying x + -0.505050505 = -7.801354794 Reorder the terms: -0.505050505 + x = -7.801354794 Solving -0.505050505 + x = -7.801354794 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.505050505' to each side of the equation. -0.505050505 + 0.505050505 + x = -7.801354794 + 0.505050505 Combine like terms: -0.505050505 + 0.505050505 = 0.000000000 0.000000000 + x = -7.801354794 + 0.505050505 x = -7.801354794 + 0.505050505 Combine like terms: -7.801354794 + 0.505050505 = -7.296304289 x = -7.296304289 Simplifying x = -7.296304289

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.306405299, -7.296304289}

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