x^2+1.8x-.176=0

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Solution for x^2+1.8x-.176=0 equation:


Simplifying
x2 + 1.8x + -0.176 = 0

Reorder the terms:
-0.176 + 1.8x + x2 = 0

Solving
-0.176 + 1.8x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '0.176' to each side of the equation.
-0.176 + 1.8x + 0.176 + x2 = 0 + 0.176

Reorder the terms:
-0.176 + 0.176 + 1.8x + x2 = 0 + 0.176

Combine like terms: -0.176 + 0.176 = 0.000
0.000 + 1.8x + x2 = 0 + 0.176
1.8x + x2 = 0 + 0.176

Combine like terms: 0 + 0.176 = 0.176
1.8x + x2 = 0.176

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 = 0.176 + 0.81

Reorder the terms:
0.81 + 1.8x + x2 = 0.176 + 0.81

Combine like terms: 0.176 + 0.81 = 0.986
0.81 + 1.8x + x2 = 0.986

Factor a perfect square on the left side:
(x + 0.9)(x + 0.9) = 0.986

Calculate the square root of the right side: 0.992975327

Break this problem into two subproblems by setting 
(x + 0.9) equal to 0.992975327 and -0.992975327.

Subproblem 1

x + 0.9 = 0.992975327 Simplifying x + 0.9 = 0.992975327 Reorder the terms: 0.9 + x = 0.992975327 Solving 0.9 + x = 0.992975327 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 = 0.992975327 + -0.9 Combine like terms: 0.9 + -0.9 = 0.0 0.0 + x = 0.992975327 + -0.9 x = 0.992975327 + -0.9 Combine like terms: 0.992975327 + -0.9 = 0.092975327 x = 0.092975327 Simplifying x = 0.092975327

Subproblem 2

x + 0.9 = -0.992975327 Simplifying x + 0.9 = -0.992975327 Reorder the terms: 0.9 + x = -0.992975327 Solving 0.9 + x = -0.992975327 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 = -0.992975327 + -0.9 Combine like terms: 0.9 + -0.9 = 0.0 0.0 + x = -0.992975327 + -0.9 x = -0.992975327 + -0.9 Combine like terms: -0.992975327 + -0.9 = -1.892975327 x = -1.892975327 Simplifying x = -1.892975327

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.092975327, -1.892975327}

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