0.51x^2+80x-1880=0

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Solution for 0.51x^2+80x-1880=0 equation:


Simplifying
0.51x2 + 80x + -1880 = 0

Reorder the terms:
-1880 + 80x + 0.51x2 = 0

Solving
-1880 + 80x + 0.51x2 = 0

Solving for variable 'x'.

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

Divide each side by '0.51'.
-3686.27451 + 156.8627451x + x2 = 0

Move the constant term to the right:

Add '3686.27451' to each side of the equation.
-3686.27451 + 156.8627451x + 3686.27451 + x2 = 0 + 3686.27451

Reorder the terms:
-3686.27451 + 3686.27451 + 156.8627451x + x2 = 0 + 3686.27451

Combine like terms: -3686.27451 + 3686.27451 = 0.00000
0.00000 + 156.8627451x + x2 = 0 + 3686.27451
156.8627451x + x2 = 0 + 3686.27451

Combine like terms: 0 + 3686.27451 = 3686.27451
156.8627451x + x2 = 3686.27451

The x term is 156.8627451x.  Take half its coefficient (78.43137255).
Square it (6151.480200) and add it to both sides.

Add '6151.480200' to each side of the equation.
156.8627451x + 6151.480200 + x2 = 3686.27451 + 6151.480200

Reorder the terms:
6151.480200 + 156.8627451x + x2 = 3686.27451 + 6151.480200

Combine like terms: 3686.27451 + 6151.480200 = 9837.75471
6151.480200 + 156.8627451x + x2 = 9837.75471

Factor a perfect square on the left side:
(x + 78.43137255)(x + 78.43137255) = 9837.75471

Calculate the square root of the right side: 99.185456142

Break this problem into two subproblems by setting 
(x + 78.43137255) equal to 99.185456142 and -99.185456142.

Subproblem 1

x + 78.43137255 = 99.185456142 Simplifying x + 78.43137255 = 99.185456142 Reorder the terms: 78.43137255 + x = 99.185456142 Solving 78.43137255 + x = 99.185456142 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-78.43137255' to each side of the equation. 78.43137255 + -78.43137255 + x = 99.185456142 + -78.43137255 Combine like terms: 78.43137255 + -78.43137255 = 0.00000000 0.00000000 + x = 99.185456142 + -78.43137255 x = 99.185456142 + -78.43137255 Combine like terms: 99.185456142 + -78.43137255 = 20.754083592 x = 20.754083592 Simplifying x = 20.754083592

Subproblem 2

x + 78.43137255 = -99.185456142 Simplifying x + 78.43137255 = -99.185456142 Reorder the terms: 78.43137255 + x = -99.185456142 Solving 78.43137255 + x = -99.185456142 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-78.43137255' to each side of the equation. 78.43137255 + -78.43137255 + x = -99.185456142 + -78.43137255 Combine like terms: 78.43137255 + -78.43137255 = 0.00000000 0.00000000 + x = -99.185456142 + -78.43137255 x = -99.185456142 + -78.43137255 Combine like terms: -99.185456142 + -78.43137255 = -177.616828692 x = -177.616828692 Simplifying x = -177.616828692

Solution

The solution to the problem is based on the solutions from the subproblems. x = {20.754083592, -177.616828692}

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