16x^2-21x+2=0

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Solution for 16x^2-21x+2=0 equation:


Simplifying
16x2 + -21x + 2 = 0

Reorder the terms:
2 + -21x + 16x2 = 0

Solving
2 + -21x + 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'.
0.125 + -1.3125x + x2 = 0

Move the constant term to the right:

Add '-0.125' to each side of the equation.
0.125 + -1.3125x + -0.125 + x2 = 0 + -0.125

Reorder the terms:
0.125 + -0.125 + -1.3125x + x2 = 0 + -0.125

Combine like terms: 0.125 + -0.125 = 0.000
0.000 + -1.3125x + x2 = 0 + -0.125
-1.3125x + x2 = 0 + -0.125

Combine like terms: 0 + -0.125 = -0.125
-1.3125x + x2 = -0.125

The x term is -1.3125x.  Take half its coefficient (-0.65625).
Square it (0.4306640625) and add it to both sides.

Add '0.4306640625' to each side of the equation.
-1.3125x + 0.4306640625 + x2 = -0.125 + 0.4306640625

Reorder the terms:
0.4306640625 + -1.3125x + x2 = -0.125 + 0.4306640625

Combine like terms: -0.125 + 0.4306640625 = 0.3056640625
0.4306640625 + -1.3125x + x2 = 0.3056640625

Factor a perfect square on the left side:
(x + -0.65625)(x + -0.65625) = 0.3056640625

Calculate the square root of the right side: 0.552868938

Break this problem into two subproblems by setting 
(x + -0.65625) equal to 0.552868938 and -0.552868938.

Subproblem 1

x + -0.65625 = 0.552868938 Simplifying x + -0.65625 = 0.552868938 Reorder the terms: -0.65625 + x = 0.552868938 Solving -0.65625 + x = 0.552868938 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.65625' to each side of the equation. -0.65625 + 0.65625 + x = 0.552868938 + 0.65625 Combine like terms: -0.65625 + 0.65625 = 0.00000 0.00000 + x = 0.552868938 + 0.65625 x = 0.552868938 + 0.65625 Combine like terms: 0.552868938 + 0.65625 = 1.209118938 x = 1.209118938 Simplifying x = 1.209118938

Subproblem 2

x + -0.65625 = -0.552868938 Simplifying x + -0.65625 = -0.552868938 Reorder the terms: -0.65625 + x = -0.552868938 Solving -0.65625 + x = -0.552868938 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.65625' to each side of the equation. -0.65625 + 0.65625 + x = -0.552868938 + 0.65625 Combine like terms: -0.65625 + 0.65625 = 0.00000 0.00000 + x = -0.552868938 + 0.65625 x = -0.552868938 + 0.65625 Combine like terms: -0.552868938 + 0.65625 = 0.103381062 x = 0.103381062 Simplifying x = 0.103381062

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.209118938, 0.103381062}

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