x^2+.05x-.15=0

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Solution for x^2+.05x-.15=0 equation:


Simplifying
x2 + 0.05x + -0.15 = 0

Reorder the terms:
-0.15 + 0.05x + x2 = 0

Solving
-0.15 + 0.05x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '0.15' to each side of the equation.
-0.15 + 0.05x + 0.15 + x2 = 0 + 0.15

Reorder the terms:
-0.15 + 0.15 + 0.05x + x2 = 0 + 0.15

Combine like terms: -0.15 + 0.15 = 0.00
0.00 + 0.05x + x2 = 0 + 0.15
0.05x + x2 = 0 + 0.15

Combine like terms: 0 + 0.15 = 0.15
0.05x + x2 = 0.15

The x term is 0.05x.  Take half its coefficient (0.025).
Square it (0.000625) and add it to both sides.

Add '0.000625' to each side of the equation.
0.05x + 0.000625 + x2 = 0.15 + 0.000625

Reorder the terms:
0.000625 + 0.05x + x2 = 0.15 + 0.000625

Combine like terms: 0.15 + 0.000625 = 0.150625
0.000625 + 0.05x + x2 = 0.150625

Factor a perfect square on the left side:
(x + 0.025)(x + 0.025) = 0.150625

Calculate the square root of the right side: 0.388104367

Break this problem into two subproblems by setting 
(x + 0.025) equal to 0.388104367 and -0.388104367.

Subproblem 1

x + 0.025 = 0.388104367 Simplifying x + 0.025 = 0.388104367 Reorder the terms: 0.025 + x = 0.388104367 Solving 0.025 + x = 0.388104367 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.025' to each side of the equation. 0.025 + -0.025 + x = 0.388104367 + -0.025 Combine like terms: 0.025 + -0.025 = 0.000 0.000 + x = 0.388104367 + -0.025 x = 0.388104367 + -0.025 Combine like terms: 0.388104367 + -0.025 = 0.363104367 x = 0.363104367 Simplifying x = 0.363104367

Subproblem 2

x + 0.025 = -0.388104367 Simplifying x + 0.025 = -0.388104367 Reorder the terms: 0.025 + x = -0.388104367 Solving 0.025 + x = -0.388104367 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.025' to each side of the equation. 0.025 + -0.025 + x = -0.388104367 + -0.025 Combine like terms: 0.025 + -0.025 = 0.000 0.000 + x = -0.388104367 + -0.025 x = -0.388104367 + -0.025 Combine like terms: -0.388104367 + -0.025 = -0.413104367 x = -0.413104367 Simplifying x = -0.413104367

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.363104367, -0.413104367}

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