2x^2-45x+8=0

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Solution for 2x^2-45x+8=0 equation:


Simplifying
2x2 + -45x + 8 = 0

Reorder the terms:
8 + -45x + 2x2 = 0

Solving
8 + -45x + 2x2 = 0

Solving for variable 'x'.

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

Divide each side by '2'.
4 + -22.5x + x2 = 0

Move the constant term to the right:

Add '-4' to each side of the equation.
4 + -22.5x + -4 + x2 = 0 + -4

Reorder the terms:
4 + -4 + -22.5x + x2 = 0 + -4

Combine like terms: 4 + -4 = 0
0 + -22.5x + x2 = 0 + -4
-22.5x + x2 = 0 + -4

Combine like terms: 0 + -4 = -4
-22.5x + x2 = -4

The x term is -22.5x.  Take half its coefficient (-11.25).
Square it (126.5625) and add it to both sides.

Add '126.5625' to each side of the equation.
-22.5x + 126.5625 + x2 = -4 + 126.5625

Reorder the terms:
126.5625 + -22.5x + x2 = -4 + 126.5625

Combine like terms: -4 + 126.5625 = 122.5625
126.5625 + -22.5x + x2 = 122.5625

Factor a perfect square on the left side:
(x + -11.25)(x + -11.25) = 122.5625

Calculate the square root of the right side: 11.070794913

Break this problem into two subproblems by setting 
(x + -11.25) equal to 11.070794913 and -11.070794913.

Subproblem 1

x + -11.25 = 11.070794913 Simplifying x + -11.25 = 11.070794913 Reorder the terms: -11.25 + x = 11.070794913 Solving -11.25 + x = 11.070794913 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '11.25' to each side of the equation. -11.25 + 11.25 + x = 11.070794913 + 11.25 Combine like terms: -11.25 + 11.25 = 0.00 0.00 + x = 11.070794913 + 11.25 x = 11.070794913 + 11.25 Combine like terms: 11.070794913 + 11.25 = 22.320794913 x = 22.320794913 Simplifying x = 22.320794913

Subproblem 2

x + -11.25 = -11.070794913 Simplifying x + -11.25 = -11.070794913 Reorder the terms: -11.25 + x = -11.070794913 Solving -11.25 + x = -11.070794913 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '11.25' to each side of the equation. -11.25 + 11.25 + x = -11.070794913 + 11.25 Combine like terms: -11.25 + 11.25 = 0.00 0.00 + x = -11.070794913 + 11.25 x = -11.070794913 + 11.25 Combine like terms: -11.070794913 + 11.25 = 0.179205087 x = 0.179205087 Simplifying x = 0.179205087

Solution

The solution to the problem is based on the solutions from the subproblems. x = {22.320794913, 0.179205087}

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