8x^2-2x-45*4x+9=0

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Solution for 8x^2-2x-45*4x+9=0 equation:


Simplifying
8x2 + -2x + -45 * 4x + 9 = 0

Multiply -45 * 4
8x2 + -2x + -180x + 9 = 0

Reorder the terms:
9 + -2x + -180x + 8x2 = 0

Combine like terms: -2x + -180x = -182x
9 + -182x + 8x2 = 0

Solving
9 + -182x + 8x2 = 0

Solving for variable 'x'.

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

Divide each side by '8'.
1.125 + -22.75x + x2 = 0

Move the constant term to the right:

Add '-1.125' to each side of the equation.
1.125 + -22.75x + -1.125 + x2 = 0 + -1.125

Reorder the terms:
1.125 + -1.125 + -22.75x + x2 = 0 + -1.125

Combine like terms: 1.125 + -1.125 = 0.000
0.000 + -22.75x + x2 = 0 + -1.125
-22.75x + x2 = 0 + -1.125

Combine like terms: 0 + -1.125 = -1.125
-22.75x + x2 = -1.125

The x term is -22.75x.  Take half its coefficient (-11.375).
Square it (129.390625) and add it to both sides.

Add '129.390625' to each side of the equation.
-22.75x + 129.390625 + x2 = -1.125 + 129.390625

Reorder the terms:
129.390625 + -22.75x + x2 = -1.125 + 129.390625

Combine like terms: -1.125 + 129.390625 = 128.265625
129.390625 + -22.75x + x2 = 128.265625

Factor a perfect square on the left side:
(x + -11.375)(x + -11.375) = 128.265625

Calculate the square root of the right side: 11.325441492

Break this problem into two subproblems by setting 
(x + -11.375) equal to 11.325441492 and -11.325441492.

Subproblem 1

x + -11.375 = 11.325441492 Simplifying x + -11.375 = 11.325441492 Reorder the terms: -11.375 + x = 11.325441492 Solving -11.375 + x = 11.325441492 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '11.375' to each side of the equation. -11.375 + 11.375 + x = 11.325441492 + 11.375 Combine like terms: -11.375 + 11.375 = 0.000 0.000 + x = 11.325441492 + 11.375 x = 11.325441492 + 11.375 Combine like terms: 11.325441492 + 11.375 = 22.700441492 x = 22.700441492 Simplifying x = 22.700441492

Subproblem 2

x + -11.375 = -11.325441492 Simplifying x + -11.375 = -11.325441492 Reorder the terms: -11.375 + x = -11.325441492 Solving -11.375 + x = -11.325441492 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '11.375' to each side of the equation. -11.375 + 11.375 + x = -11.325441492 + 11.375 Combine like terms: -11.375 + 11.375 = 0.000 0.000 + x = -11.325441492 + 11.375 x = -11.325441492 + 11.375 Combine like terms: -11.325441492 + 11.375 = 0.049558508 x = 0.049558508 Simplifying x = 0.049558508

Solution

The solution to the problem is based on the solutions from the subproblems. x = {22.700441492, 0.049558508}

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