x^2+1.8x-0.1476=0

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Solution for x^2+1.8x-0.1476=0 equation:


Simplifying
x2 + 1.8x + -0.1476 = 0

Reorder the terms:
-0.1476 + 1.8x + x2 = 0

Solving
-0.1476 + 1.8x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '0.1476' to each side of the equation.
-0.1476 + 1.8x + 0.1476 + x2 = 0 + 0.1476

Reorder the terms:
-0.1476 + 0.1476 + 1.8x + x2 = 0 + 0.1476

Combine like terms: -0.1476 + 0.1476 = 0.0000
0.0000 + 1.8x + x2 = 0 + 0.1476
1.8x + x2 = 0 + 0.1476

Combine like terms: 0 + 0.1476 = 0.1476
1.8x + x2 = 0.1476

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 = 0.1476 + 0.81

Reorder the terms:
0.81 + 1.8x + x2 = 0.1476 + 0.81

Combine like terms: 0.1476 + 0.81 = 0.9576
0.81 + 1.8x + x2 = 0.9576

Factor a perfect square on the left side:
(x + 0.9)(x + 0.9) = 0.9576

Calculate the square root of the right side: 0.978570386

Break this problem into two subproblems by setting 
(x + 0.9) equal to 0.978570386 and -0.978570386.

Subproblem 1

x + 0.9 = 0.978570386 Simplifying x + 0.9 = 0.978570386 Reorder the terms: 0.9 + x = 0.978570386 Solving 0.9 + x = 0.978570386 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 = 0.978570386 + -0.9 Combine like terms: 0.9 + -0.9 = 0.0 0.0 + x = 0.978570386 + -0.9 x = 0.978570386 + -0.9 Combine like terms: 0.978570386 + -0.9 = 0.078570386 x = 0.078570386 Simplifying x = 0.078570386

Subproblem 2

x + 0.9 = -0.978570386 Simplifying x + 0.9 = -0.978570386 Reorder the terms: 0.9 + x = -0.978570386 Solving 0.9 + x = -0.978570386 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 = -0.978570386 + -0.9 Combine like terms: 0.9 + -0.9 = 0.0 0.0 + x = -0.978570386 + -0.9 x = -0.978570386 + -0.9 Combine like terms: -0.978570386 + -0.9 = -1.878570386 x = -1.878570386 Simplifying x = -1.878570386

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.078570386, -1.878570386}

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