9x^2-61x+4=0

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Solution for 9x^2-61x+4=0 equation:


Simplifying
9x2 + -61x + 4 = 0

Reorder the terms:
4 + -61x + 9x2 = 0

Solving
4 + -61x + 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'.
0.4444444444 + -6.777777778x + x2 = 0

Move the constant term to the right:

Add '-0.4444444444' to each side of the equation.
0.4444444444 + -6.777777778x + -0.4444444444 + x2 = 0 + -0.4444444444

Reorder the terms:
0.4444444444 + -0.4444444444 + -6.777777778x + x2 = 0 + -0.4444444444

Combine like terms: 0.4444444444 + -0.4444444444 = 0.0000000000
0.0000000000 + -6.777777778x + x2 = 0 + -0.4444444444
-6.777777778x + x2 = 0 + -0.4444444444

Combine like terms: 0 + -0.4444444444 = -0.4444444444
-6.777777778x + x2 = -0.4444444444

The x term is -6.777777778x.  Take half its coefficient (-3.388888889).
Square it (11.48456790) and add it to both sides.

Add '11.48456790' to each side of the equation.
-6.777777778x + 11.48456790 + x2 = -0.4444444444 + 11.48456790

Reorder the terms:
11.48456790 + -6.777777778x + x2 = -0.4444444444 + 11.48456790

Combine like terms: -0.4444444444 + 11.48456790 = 11.0401234556
11.48456790 + -6.777777778x + x2 = 11.0401234556

Factor a perfect square on the left side:
(x + -3.388888889)(x + -3.388888889) = 11.0401234556

Calculate the square root of the right side: 3.322668123

Break this problem into two subproblems by setting 
(x + -3.388888889) equal to 3.322668123 and -3.322668123.

Subproblem 1

x + -3.388888889 = 3.322668123 Simplifying x + -3.388888889 = 3.322668123 Reorder the terms: -3.388888889 + x = 3.322668123 Solving -3.388888889 + x = 3.322668123 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.388888889' to each side of the equation. -3.388888889 + 3.388888889 + x = 3.322668123 + 3.388888889 Combine like terms: -3.388888889 + 3.388888889 = 0.000000000 0.000000000 + x = 3.322668123 + 3.388888889 x = 3.322668123 + 3.388888889 Combine like terms: 3.322668123 + 3.388888889 = 6.711557012 x = 6.711557012 Simplifying x = 6.711557012

Subproblem 2

x + -3.388888889 = -3.322668123 Simplifying x + -3.388888889 = -3.322668123 Reorder the terms: -3.388888889 + x = -3.322668123 Solving -3.388888889 + x = -3.322668123 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.388888889' to each side of the equation. -3.388888889 + 3.388888889 + x = -3.322668123 + 3.388888889 Combine like terms: -3.388888889 + 3.388888889 = 0.000000000 0.000000000 + x = -3.322668123 + 3.388888889 x = -3.322668123 + 3.388888889 Combine like terms: -3.322668123 + 3.388888889 = 0.066220766 x = 0.066220766 Simplifying x = 0.066220766

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.711557012, 0.066220766}

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