16x^2-40x+17=0

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Solution for 16x^2-40x+17=0 equation:


Simplifying
16x2 + -40x + 17 = 0

Reorder the terms:
17 + -40x + 16x2 = 0

Solving
17 + -40x + 16x2 = 0

Solving for variable 'x'.

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

Divide each side by '16'.
1.0625 + -2.5x + x2 = 0

Move the constant term to the right:

Add '-1.0625' to each side of the equation.
1.0625 + -2.5x + -1.0625 + x2 = 0 + -1.0625

Reorder the terms:
1.0625 + -1.0625 + -2.5x + x2 = 0 + -1.0625

Combine like terms: 1.0625 + -1.0625 = 0.0000
0.0000 + -2.5x + x2 = 0 + -1.0625
-2.5x + x2 = 0 + -1.0625

Combine like terms: 0 + -1.0625 = -1.0625
-2.5x + x2 = -1.0625

The x term is -2.5x.  Take half its coefficient (-1.25).
Square it (1.5625) and add it to both sides.

Add '1.5625' to each side of the equation.
-2.5x + 1.5625 + x2 = -1.0625 + 1.5625

Reorder the terms:
1.5625 + -2.5x + x2 = -1.0625 + 1.5625

Combine like terms: -1.0625 + 1.5625 = 0.5
1.5625 + -2.5x + x2 = 0.5

Factor a perfect square on the left side:
(x + -1.25)(x + -1.25) = 0.5

Calculate the square root of the right side: 0.707106781

Break this problem into two subproblems by setting 
(x + -1.25) equal to 0.707106781 and -0.707106781.

Subproblem 1

x + -1.25 = 0.707106781 Simplifying x + -1.25 = 0.707106781 Reorder the terms: -1.25 + x = 0.707106781 Solving -1.25 + x = 0.707106781 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + x = 0.707106781 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + x = 0.707106781 + 1.25 x = 0.707106781 + 1.25 Combine like terms: 0.707106781 + 1.25 = 1.957106781 x = 1.957106781 Simplifying x = 1.957106781

Subproblem 2

x + -1.25 = -0.707106781 Simplifying x + -1.25 = -0.707106781 Reorder the terms: -1.25 + x = -0.707106781 Solving -1.25 + x = -0.707106781 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + x = -0.707106781 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + x = -0.707106781 + 1.25 x = -0.707106781 + 1.25 Combine like terms: -0.707106781 + 1.25 = 0.542893219 x = 0.542893219 Simplifying x = 0.542893219

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.957106781, 0.542893219}

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