x^2-122x+90=0

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Solution for x^2-122x+90=0 equation:


Simplifying
x2 + -122x + 90 = 0

Reorder the terms:
90 + -122x + x2 = 0

Solving
90 + -122x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-90' to each side of the equation.
90 + -122x + -90 + x2 = 0 + -90

Reorder the terms:
90 + -90 + -122x + x2 = 0 + -90

Combine like terms: 90 + -90 = 0
0 + -122x + x2 = 0 + -90
-122x + x2 = 0 + -90

Combine like terms: 0 + -90 = -90
-122x + x2 = -90

The x term is -122x.  Take half its coefficient (-61).
Square it (3721) and add it to both sides.

Add '3721' to each side of the equation.
-122x + 3721 + x2 = -90 + 3721

Reorder the terms:
3721 + -122x + x2 = -90 + 3721

Combine like terms: -90 + 3721 = 3631
3721 + -122x + x2 = 3631

Factor a perfect square on the left side:
(x + -61)(x + -61) = 3631

Calculate the square root of the right side: 60.257779581

Break this problem into two subproblems by setting 
(x + -61) equal to 60.257779581 and -60.257779581.

Subproblem 1

x + -61 = 60.257779581 Simplifying x + -61 = 60.257779581 Reorder the terms: -61 + x = 60.257779581 Solving -61 + x = 60.257779581 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '61' to each side of the equation. -61 + 61 + x = 60.257779581 + 61 Combine like terms: -61 + 61 = 0 0 + x = 60.257779581 + 61 x = 60.257779581 + 61 Combine like terms: 60.257779581 + 61 = 121.257779581 x = 121.257779581 Simplifying x = 121.257779581

Subproblem 2

x + -61 = -60.257779581 Simplifying x + -61 = -60.257779581 Reorder the terms: -61 + x = -60.257779581 Solving -61 + x = -60.257779581 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '61' to each side of the equation. -61 + 61 + x = -60.257779581 + 61 Combine like terms: -61 + 61 = 0 0 + x = -60.257779581 + 61 x = -60.257779581 + 61 Combine like terms: -60.257779581 + 61 = 0.742220419 x = 0.742220419 Simplifying x = 0.742220419

Solution

The solution to the problem is based on the solutions from the subproblems. x = {121.257779581, 0.742220419}

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