9x^2-64x+45=0

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Solution for 9x^2-64x+45=0 equation:


Simplifying
9x2 + -64x + 45 = 0

Reorder the terms:
45 + -64x + 9x2 = 0

Solving
45 + -64x + 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'.
5 + -7.111111111x + x2 = 0

Move the constant term to the right:

Add '-5' to each side of the equation.
5 + -7.111111111x + -5 + x2 = 0 + -5

Reorder the terms:
5 + -5 + -7.111111111x + x2 = 0 + -5

Combine like terms: 5 + -5 = 0
0 + -7.111111111x + x2 = 0 + -5
-7.111111111x + x2 = 0 + -5

Combine like terms: 0 + -5 = -5
-7.111111111x + x2 = -5

The x term is -7.111111111x.  Take half its coefficient (-3.555555556).
Square it (12.64197531) and add it to both sides.

Add '12.64197531' to each side of the equation.
-7.111111111x + 12.64197531 + x2 = -5 + 12.64197531

Reorder the terms:
12.64197531 + -7.111111111x + x2 = -5 + 12.64197531

Combine like terms: -5 + 12.64197531 = 7.64197531
12.64197531 + -7.111111111x + x2 = 7.64197531

Factor a perfect square on the left side:
(x + -3.555555556)(x + -3.555555556) = 7.64197531

Calculate the square root of the right side: 2.76441229

Break this problem into two subproblems by setting 
(x + -3.555555556) equal to 2.76441229 and -2.76441229.

Subproblem 1

x + -3.555555556 = 2.76441229 Simplifying x + -3.555555556 = 2.76441229 Reorder the terms: -3.555555556 + x = 2.76441229 Solving -3.555555556 + x = 2.76441229 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.555555556' to each side of the equation. -3.555555556 + 3.555555556 + x = 2.76441229 + 3.555555556 Combine like terms: -3.555555556 + 3.555555556 = 0.000000000 0.000000000 + x = 2.76441229 + 3.555555556 x = 2.76441229 + 3.555555556 Combine like terms: 2.76441229 + 3.555555556 = 6.319967846 x = 6.319967846 Simplifying x = 6.319967846

Subproblem 2

x + -3.555555556 = -2.76441229 Simplifying x + -3.555555556 = -2.76441229 Reorder the terms: -3.555555556 + x = -2.76441229 Solving -3.555555556 + x = -2.76441229 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.555555556' to each side of the equation. -3.555555556 + 3.555555556 + x = -2.76441229 + 3.555555556 Combine like terms: -3.555555556 + 3.555555556 = 0.000000000 0.000000000 + x = -2.76441229 + 3.555555556 x = -2.76441229 + 3.555555556 Combine like terms: -2.76441229 + 3.555555556 = 0.791143266 x = 0.791143266 Simplifying x = 0.791143266

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.319967846, 0.791143266}

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