x^2+1.8x=0.162

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Solution for x^2+1.8x=0.162 equation:


Simplifying
x2 + 1.8x = 0.162

Reorder the terms:
1.8x + x2 = 0.162

Solving
1.8x + x2 = 0.162

Solving for variable 'x'.

Reorder the terms:
-0.162 + 1.8x + x2 = 0.162 + -0.162

Combine like terms: 0.162 + -0.162 = 0.000
-0.162 + 1.8x + x2 = 0.000

Begin completing the square.

Move the constant term to the right:

Add '0.162' to each side of the equation.
-0.162 + 1.8x + 0.162 + x2 = 0.000 + 0.162

Reorder the terms:
-0.162 + 0.162 + 1.8x + x2 = 0.000 + 0.162

Combine like terms: -0.162 + 0.162 = 0.000
0.000 + 1.8x + x2 = 0.000 + 0.162
1.8x + x2 = 0.000 + 0.162

Combine like terms: 0.000 + 0.162 = 0.162
1.8x + x2 = 0.162

The x term is 1.8x.  Take half its coefficient (0.9).
Square it (0.81) and add it to both sides.

Add '0.81' to each side of the equation.
1.8x + 0.81 + x2 = 0.162 + 0.81

Reorder the terms:
0.81 + 1.8x + x2 = 0.162 + 0.81

Combine like terms: 0.162 + 0.81 = 0.972
0.81 + 1.8x + x2 = 0.972

Factor a perfect square on the left side:
(x + 0.9)(x + 0.9) = 0.972

Calculate the square root of the right side: 0.985900604

Break this problem into two subproblems by setting 
(x + 0.9) equal to 0.985900604 and -0.985900604.

Subproblem 1

x + 0.9 = 0.985900604 Simplifying x + 0.9 = 0.985900604 Reorder the terms: 0.9 + x = 0.985900604 Solving 0.9 + x = 0.985900604 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.9' to each side of the equation. 0.9 + -0.9 + x = 0.985900604 + -0.9 Combine like terms: 0.9 + -0.9 = 0.0 0.0 + x = 0.985900604 + -0.9 x = 0.985900604 + -0.9 Combine like terms: 0.985900604 + -0.9 = 0.085900604 x = 0.085900604 Simplifying x = 0.085900604

Subproblem 2

x + 0.9 = -0.985900604 Simplifying x + 0.9 = -0.985900604 Reorder the terms: 0.9 + x = -0.985900604 Solving 0.9 + x = -0.985900604 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.9' to each side of the equation. 0.9 + -0.9 + x = -0.985900604 + -0.9 Combine like terms: 0.9 + -0.9 = 0.0 0.0 + x = -0.985900604 + -0.9 x = -0.985900604 + -0.9 Combine like terms: -0.985900604 + -0.9 = -1.885900604 x = -1.885900604 Simplifying x = -1.885900604

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.085900604, -1.885900604}

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