0=-x^2+18.843666x+679.191375

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Solution for 0=-x^2+18.843666x+679.191375 equation:


Simplifying
0 = -1x2 + 18.843666x + 679.191375

Reorder the terms:
0 = 679.191375 + 18.843666x + -1x2

Solving
0 = 679.191375 + 18.843666x + -1x2

Solving for variable 'x'.

Combine like terms: 0 + -679.191375 = -679.191375
-679.191375 + -18.843666x + x2 = 679.191375 + 18.843666x + -1x2 + -679.191375 + -18.843666x + x2

Reorder the terms:
-679.191375 + -18.843666x + x2 = 679.191375 + -679.191375 + 18.843666x + -18.843666x + -1x2 + x2

Combine like terms: 679.191375 + -679.191375 = 0.000000
-679.191375 + -18.843666x + x2 = 0.000000 + 18.843666x + -18.843666x + -1x2 + x2
-679.191375 + -18.843666x + x2 = 18.843666x + -18.843666x + -1x2 + x2

Combine like terms: 18.843666x + -18.843666x = 0.000000
-679.191375 + -18.843666x + x2 = 0.000000 + -1x2 + x2
-679.191375 + -18.843666x + x2 = -1x2 + x2

Combine like terms: -1x2 + x2 = 0
-679.191375 + -18.843666x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '679.191375' to each side of the equation.
-679.191375 + -18.843666x + 679.191375 + x2 = 0 + 679.191375

Reorder the terms:
-679.191375 + 679.191375 + -18.843666x + x2 = 0 + 679.191375

Combine like terms: -679.191375 + 679.191375 = 0.000000
0.000000 + -18.843666x + x2 = 0 + 679.191375
-18.843666x + x2 = 0 + 679.191375

Combine like terms: 0 + 679.191375 = 679.191375
-18.843666x + x2 = 679.191375

The x term is -18.843666x.  Take half its coefficient (-9.421833).
Square it (88.77093708) and add it to both sides.

Add '88.77093708' to each side of the equation.
-18.843666x + 88.77093708 + x2 = 679.191375 + 88.77093708

Reorder the terms:
88.77093708 + -18.843666x + x2 = 679.191375 + 88.77093708

Combine like terms: 679.191375 + 88.77093708 = 767.96231208
88.77093708 + -18.843666x + x2 = 767.96231208

Factor a perfect square on the left side:
(x + -9.421833)(x + -9.421833) = 767.96231208

Calculate the square root of the right side: 27.71213294

Break this problem into two subproblems by setting 
(x + -9.421833) equal to 27.71213294 and -27.71213294.

Subproblem 1

x + -9.421833 = 27.71213294 Simplifying x + -9.421833 = 27.71213294 Reorder the terms: -9.421833 + x = 27.71213294 Solving -9.421833 + x = 27.71213294 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '9.421833' to each side of the equation. -9.421833 + 9.421833 + x = 27.71213294 + 9.421833 Combine like terms: -9.421833 + 9.421833 = 0.000000 0.000000 + x = 27.71213294 + 9.421833 x = 27.71213294 + 9.421833 Combine like terms: 27.71213294 + 9.421833 = 37.13396594 x = 37.13396594 Simplifying x = 37.13396594

Subproblem 2

x + -9.421833 = -27.71213294 Simplifying x + -9.421833 = -27.71213294 Reorder the terms: -9.421833 + x = -27.71213294 Solving -9.421833 + x = -27.71213294 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '9.421833' to each side of the equation. -9.421833 + 9.421833 + x = -27.71213294 + 9.421833 Combine like terms: -9.421833 + 9.421833 = 0.000000 0.000000 + x = -27.71213294 + 9.421833 x = -27.71213294 + 9.421833 Combine like terms: -27.71213294 + 9.421833 = -18.29029994 x = -18.29029994 Simplifying x = -18.29029994

Solution

The solution to the problem is based on the solutions from the subproblems. x = {37.13396594, -18.29029994}

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