x^2-86x=249

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Solution for x^2-86x=249 equation:


Simplifying
x2 + -86x = 249

Reorder the terms:
-86x + x2 = 249

Solving
-86x + x2 = 249

Solving for variable 'x'.

Reorder the terms:
-249 + -86x + x2 = 249 + -249

Combine like terms: 249 + -249 = 0
-249 + -86x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '249' to each side of the equation.
-249 + -86x + 249 + x2 = 0 + 249

Reorder the terms:
-249 + 249 + -86x + x2 = 0 + 249

Combine like terms: -249 + 249 = 0
0 + -86x + x2 = 0 + 249
-86x + x2 = 0 + 249

Combine like terms: 0 + 249 = 249
-86x + x2 = 249

The x term is -86x.  Take half its coefficient (-43).
Square it (1849) and add it to both sides.

Add '1849' to each side of the equation.
-86x + 1849 + x2 = 249 + 1849

Reorder the terms:
1849 + -86x + x2 = 249 + 1849

Combine like terms: 249 + 1849 = 2098
1849 + -86x + x2 = 2098

Factor a perfect square on the left side:
(x + -43)(x + -43) = 2098

Calculate the square root of the right side: 45.803929962

Break this problem into two subproblems by setting 
(x + -43) equal to 45.803929962 and -45.803929962.

Subproblem 1

x + -43 = 45.803929962 Simplifying x + -43 = 45.803929962 Reorder the terms: -43 + x = 45.803929962 Solving -43 + x = 45.803929962 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '43' to each side of the equation. -43 + 43 + x = 45.803929962 + 43 Combine like terms: -43 + 43 = 0 0 + x = 45.803929962 + 43 x = 45.803929962 + 43 Combine like terms: 45.803929962 + 43 = 88.803929962 x = 88.803929962 Simplifying x = 88.803929962

Subproblem 2

x + -43 = -45.803929962 Simplifying x + -43 = -45.803929962 Reorder the terms: -43 + x = -45.803929962 Solving -43 + x = -45.803929962 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '43' to each side of the equation. -43 + 43 + x = -45.803929962 + 43 Combine like terms: -43 + 43 = 0 0 + x = -45.803929962 + 43 x = -45.803929962 + 43 Combine like terms: -45.803929962 + 43 = -2.803929962 x = -2.803929962 Simplifying x = -2.803929962

Solution

The solution to the problem is based on the solutions from the subproblems. x = {88.803929962, -2.803929962}

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