-0.1x^2+142x-3150=0

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Solution for -0.1x^2+142x-3150=0 equation:


Simplifying
-0.1x2 + 142x + -3150 = 0

Reorder the terms:
-3150 + 142x + -0.1x2 = 0

Solving
-3150 + 142x + -0.1x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-0.1 the coefficient of the squared term: 

Divide each side by '-0.1'.
31500 + -1420x + x2 = 0

Move the constant term to the right:

Add '-31500' to each side of the equation.
31500 + -1420x + -31500 + x2 = 0 + -31500

Reorder the terms:
31500 + -31500 + -1420x + x2 = 0 + -31500

Combine like terms: 31500 + -31500 = 0
0 + -1420x + x2 = 0 + -31500
-1420x + x2 = 0 + -31500

Combine like terms: 0 + -31500 = -31500
-1420x + x2 = -31500

The x term is -1420x.  Take half its coefficient (-710).
Square it (504100) and add it to both sides.

Add '504100' to each side of the equation.
-1420x + 504100 + x2 = -31500 + 504100

Reorder the terms:
504100 + -1420x + x2 = -31500 + 504100

Combine like terms: -31500 + 504100 = 472600
504100 + -1420x + x2 = 472600

Factor a perfect square on the left side:
(x + -710)(x + -710) = 472600

Calculate the square root of the right side: 687.459089692

Break this problem into two subproblems by setting 
(x + -710) equal to 687.459089692 and -687.459089692.

Subproblem 1

x + -710 = 687.459089692 Simplifying x + -710 = 687.459089692 Reorder the terms: -710 + x = 687.459089692 Solving -710 + x = 687.459089692 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '710' to each side of the equation. -710 + 710 + x = 687.459089692 + 710 Combine like terms: -710 + 710 = 0 0 + x = 687.459089692 + 710 x = 687.459089692 + 710 Combine like terms: 687.459089692 + 710 = 1397.459089692 x = 1397.459089692 Simplifying x = 1397.459089692

Subproblem 2

x + -710 = -687.459089692 Simplifying x + -710 = -687.459089692 Reorder the terms: -710 + x = -687.459089692 Solving -710 + x = -687.459089692 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '710' to each side of the equation. -710 + 710 + x = -687.459089692 + 710 Combine like terms: -710 + 710 = 0 0 + x = -687.459089692 + 710 x = -687.459089692 + 710 Combine like terms: -687.459089692 + 710 = 22.540910308 x = 22.540910308 Simplifying x = 22.540910308

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1397.459089692, 22.540910308}

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