9x^2-16x+1=0

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Solution for 9x^2-16x+1=0 equation:


Simplifying
9x2 + -16x + 1 = 0

Reorder the terms:
1 + -16x + 9x2 = 0

Solving
1 + -16x + 9x2 = 0

Solving for variable 'x'.

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

Divide each side by '9'.
0.1111111111 + -1.777777778x + x2 = 0

Move the constant term to the right:

Add '-0.1111111111' to each side of the equation.
0.1111111111 + -1.777777778x + -0.1111111111 + x2 = 0 + -0.1111111111

Reorder the terms:
0.1111111111 + -0.1111111111 + -1.777777778x + x2 = 0 + -0.1111111111

Combine like terms: 0.1111111111 + -0.1111111111 = 0.0000000000
0.0000000000 + -1.777777778x + x2 = 0 + -0.1111111111
-1.777777778x + x2 = 0 + -0.1111111111

Combine like terms: 0 + -0.1111111111 = -0.1111111111
-1.777777778x + x2 = -0.1111111111

The x term is -1.777777778x.  Take half its coefficient (-0.888888889).
Square it (0.7901234570) and add it to both sides.

Add '0.7901234570' to each side of the equation.
-1.777777778x + 0.7901234570 + x2 = -0.1111111111 + 0.7901234570

Reorder the terms:
0.7901234570 + -1.777777778x + x2 = -0.1111111111 + 0.7901234570

Combine like terms: -0.1111111111 + 0.7901234570 = 0.6790123459
0.7901234570 + -1.777777778x + x2 = 0.6790123459

Factor a perfect square on the left side:
(x + -0.888888889)(x + -0.888888889) = 0.6790123459

Calculate the square root of the right side: 0.824022054

Break this problem into two subproblems by setting 
(x + -0.888888889) equal to 0.824022054 and -0.824022054.

Subproblem 1

x + -0.888888889 = 0.824022054 Simplifying x + -0.888888889 = 0.824022054 Reorder the terms: -0.888888889 + x = 0.824022054 Solving -0.888888889 + x = 0.824022054 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.888888889' to each side of the equation. -0.888888889 + 0.888888889 + x = 0.824022054 + 0.888888889 Combine like terms: -0.888888889 + 0.888888889 = 0.000000000 0.000000000 + x = 0.824022054 + 0.888888889 x = 0.824022054 + 0.888888889 Combine like terms: 0.824022054 + 0.888888889 = 1.712910943 x = 1.712910943 Simplifying x = 1.712910943

Subproblem 2

x + -0.888888889 = -0.824022054 Simplifying x + -0.888888889 = -0.824022054 Reorder the terms: -0.888888889 + x = -0.824022054 Solving -0.888888889 + x = -0.824022054 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.888888889' to each side of the equation. -0.888888889 + 0.888888889 + x = -0.824022054 + 0.888888889 Combine like terms: -0.888888889 + 0.888888889 = 0.000000000 0.000000000 + x = -0.824022054 + 0.888888889 x = -0.824022054 + 0.888888889 Combine like terms: -0.824022054 + 0.888888889 = 0.064866835 x = 0.064866835 Simplifying x = 0.064866835

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.712910943, 0.064866835}

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