x-13x^2+22=0

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Solution for x-13x^2+22=0 equation:


Simplifying
x + -13x2 + 22 = 0

Reorder the terms:
22 + x + -13x2 = 0

Solving
22 + x + -13x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-13 the coefficient of the squared term: 

Divide each side by '-13'.
-1.692307692 + -0.07692307692x + x2 = 0

Move the constant term to the right:

Add '1.692307692' to each side of the equation.
-1.692307692 + -0.07692307692x + 1.692307692 + x2 = 0 + 1.692307692

Reorder the terms:
-1.692307692 + 1.692307692 + -0.07692307692x + x2 = 0 + 1.692307692

Combine like terms: -1.692307692 + 1.692307692 = 0.000000000
0.000000000 + -0.07692307692x + x2 = 0 + 1.692307692
-0.07692307692x + x2 = 0 + 1.692307692

Combine like terms: 0 + 1.692307692 = 1.692307692
-0.07692307692x + x2 = 1.692307692

The x term is x.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
-0.07692307692x + 0.25 + x2 = 1.692307692 + 0.25

Reorder the terms:
0.25 + -0.07692307692x + x2 = 1.692307692 + 0.25

Combine like terms: 1.692307692 + 0.25 = 1.942307692
0.25 + -0.07692307692x + x2 = 1.942307692

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 1.942307692

Calculate the square root of the right side: 1.393666995

Break this problem into two subproblems by setting 
(x + 0.5) equal to 1.393666995 and -1.393666995.

Subproblem 1

x + 0.5 = 1.393666995 Simplifying x + 0.5 = 1.393666995 Reorder the terms: 0.5 + x = 1.393666995 Solving 0.5 + x = 1.393666995 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 1.393666995 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 1.393666995 + -0.5 x = 1.393666995 + -0.5 Combine like terms: 1.393666995 + -0.5 = 0.893666995 x = 0.893666995 Simplifying x = 0.893666995

Subproblem 2

x + 0.5 = -1.393666995 Simplifying x + 0.5 = -1.393666995 Reorder the terms: 0.5 + x = -1.393666995 Solving 0.5 + x = -1.393666995 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -1.393666995 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -1.393666995 + -0.5 x = -1.393666995 + -0.5 Combine like terms: -1.393666995 + -0.5 = -1.893666995 x = -1.893666995 Simplifying x = -1.893666995

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.893666995, -1.893666995}

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