40+x^2-2x=180-3x

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Solution for 40+x^2-2x=180-3x equation:


Simplifying
40 + x2 + -2x = 180 + -3x

Reorder the terms:
40 + -2x + x2 = 180 + -3x

Solving
40 + -2x + x2 = 180 + -3x

Solving for variable 'x'.

Reorder the terms:
40 + -180 + -2x + 3x + x2 = 180 + -3x + -180 + 3x

Combine like terms: 40 + -180 = -140
-140 + -2x + 3x + x2 = 180 + -3x + -180 + 3x

Combine like terms: -2x + 3x = 1x
-140 + 1x + x2 = 180 + -3x + -180 + 3x

Reorder the terms:
-140 + 1x + x2 = 180 + -180 + -3x + 3x

Combine like terms: 180 + -180 = 0
-140 + 1x + x2 = 0 + -3x + 3x
-140 + 1x + x2 = -3x + 3x

Combine like terms: -3x + 3x = 0
-140 + 1x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '140' to each side of the equation.
-140 + 1x + 140 + x2 = 0 + 140

Reorder the terms:
-140 + 140 + 1x + x2 = 0 + 140

Combine like terms: -140 + 140 = 0
0 + 1x + x2 = 0 + 140
1x + x2 = 0 + 140

Combine like terms: 0 + 140 = 140
1x + x2 = 140

The x term is 1x.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
x + 0.25 + x2 = 140 + 0.25

Reorder the terms:
0.25 + x + x2 = 140 + 0.25

Combine like terms: 140 + 0.25 = 140.25
0.25 + x + x2 = 140.25

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 140.25

Calculate the square root of the right side: 11.842719282

Break this problem into two subproblems by setting 
(x + 0.5) equal to 11.842719282 and -11.842719282.

Subproblem 1

x + 0.5 = 11.842719282 Simplifying x + 0.5 = 11.842719282 Reorder the terms: 0.5 + x = 11.842719282 Solving 0.5 + x = 11.842719282 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 11.842719282 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 11.842719282 + -0.5 x = 11.842719282 + -0.5 Combine like terms: 11.842719282 + -0.5 = 11.342719282 x = 11.342719282 Simplifying x = 11.342719282

Subproblem 2

x + 0.5 = -11.842719282 Simplifying x + 0.5 = -11.842719282 Reorder the terms: 0.5 + x = -11.842719282 Solving 0.5 + x = -11.842719282 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -11.842719282 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -11.842719282 + -0.5 x = -11.842719282 + -0.5 Combine like terms: -11.842719282 + -0.5 = -12.342719282 x = -12.342719282 Simplifying x = -12.342719282

Solution

The solution to the problem is based on the solutions from the subproblems. x = {11.342719282, -12.342719282}

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