26x^2-160x+211=0

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Solution for 26x^2-160x+211=0 equation:


Simplifying
26x2 + -160x + 211 = 0

Reorder the terms:
211 + -160x + 26x2 = 0

Solving
211 + -160x + 26x2 = 0

Solving for variable 'x'.

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

Divide each side by '26'.
8.115384615 + -6.153846154x + x2 = 0

Move the constant term to the right:

Add '-8.115384615' to each side of the equation.
8.115384615 + -6.153846154x + -8.115384615 + x2 = 0 + -8.115384615

Reorder the terms:
8.115384615 + -8.115384615 + -6.153846154x + x2 = 0 + -8.115384615

Combine like terms: 8.115384615 + -8.115384615 = 0.000000000
0.000000000 + -6.153846154x + x2 = 0 + -8.115384615
-6.153846154x + x2 = 0 + -8.115384615

Combine like terms: 0 + -8.115384615 = -8.115384615
-6.153846154x + x2 = -8.115384615

The x term is -6.153846154x.  Take half its coefficient (-3.076923077).
Square it (9.467455622) and add it to both sides.

Add '9.467455622' to each side of the equation.
-6.153846154x + 9.467455622 + x2 = -8.115384615 + 9.467455622

Reorder the terms:
9.467455622 + -6.153846154x + x2 = -8.115384615 + 9.467455622

Combine like terms: -8.115384615 + 9.467455622 = 1.352071007
9.467455622 + -6.153846154x + x2 = 1.352071007

Factor a perfect square on the left side:
(x + -3.076923077)(x + -3.076923077) = 1.352071007

Calculate the square root of the right side: 1.162785882

Break this problem into two subproblems by setting 
(x + -3.076923077) equal to 1.162785882 and -1.162785882.

Subproblem 1

x + -3.076923077 = 1.162785882 Simplifying x + -3.076923077 = 1.162785882 Reorder the terms: -3.076923077 + x = 1.162785882 Solving -3.076923077 + x = 1.162785882 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.076923077' to each side of the equation. -3.076923077 + 3.076923077 + x = 1.162785882 + 3.076923077 Combine like terms: -3.076923077 + 3.076923077 = 0.000000000 0.000000000 + x = 1.162785882 + 3.076923077 x = 1.162785882 + 3.076923077 Combine like terms: 1.162785882 + 3.076923077 = 4.239708959 x = 4.239708959 Simplifying x = 4.239708959

Subproblem 2

x + -3.076923077 = -1.162785882 Simplifying x + -3.076923077 = -1.162785882 Reorder the terms: -3.076923077 + x = -1.162785882 Solving -3.076923077 + x = -1.162785882 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.076923077' to each side of the equation. -3.076923077 + 3.076923077 + x = -1.162785882 + 3.076923077 Combine like terms: -3.076923077 + 3.076923077 = 0.000000000 0.000000000 + x = -1.162785882 + 3.076923077 x = -1.162785882 + 3.076923077 Combine like terms: -1.162785882 + 3.076923077 = 1.914137195 x = 1.914137195 Simplifying x = 1.914137195

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.239708959, 1.914137195}

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