x^2+0.45x-0.45=0

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Solution for x^2+0.45x-0.45=0 equation:


Simplifying
x2 + 0.45x + -0.45 = 0

Reorder the terms:
-0.45 + 0.45x + x2 = 0

Solving
-0.45 + 0.45x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '0.45' to each side of the equation.
-0.45 + 0.45x + 0.45 + x2 = 0 + 0.45

Reorder the terms:
-0.45 + 0.45 + 0.45x + x2 = 0 + 0.45

Combine like terms: -0.45 + 0.45 = 0.00
0.00 + 0.45x + x2 = 0 + 0.45
0.45x + x2 = 0 + 0.45

Combine like terms: 0 + 0.45 = 0.45
0.45x + x2 = 0.45

The x term is 0.45x.  Take half its coefficient (0.225).
Square it (0.050625) and add it to both sides.

Add '0.050625' to each side of the equation.
0.45x + 0.050625 + x2 = 0.45 + 0.050625

Reorder the terms:
0.050625 + 0.45x + x2 = 0.45 + 0.050625

Combine like terms: 0.45 + 0.050625 = 0.500625
0.050625 + 0.45x + x2 = 0.500625

Factor a perfect square on the left side:
(x + 0.225)(x + 0.225) = 0.500625

Calculate the square root of the right side: 0.707548585

Break this problem into two subproblems by setting 
(x + 0.225) equal to 0.707548585 and -0.707548585.

Subproblem 1

x + 0.225 = 0.707548585 Simplifying x + 0.225 = 0.707548585 Reorder the terms: 0.225 + x = 0.707548585 Solving 0.225 + x = 0.707548585 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.225' to each side of the equation. 0.225 + -0.225 + x = 0.707548585 + -0.225 Combine like terms: 0.225 + -0.225 = 0.000 0.000 + x = 0.707548585 + -0.225 x = 0.707548585 + -0.225 Combine like terms: 0.707548585 + -0.225 = 0.482548585 x = 0.482548585 Simplifying x = 0.482548585

Subproblem 2

x + 0.225 = -0.707548585 Simplifying x + 0.225 = -0.707548585 Reorder the terms: 0.225 + x = -0.707548585 Solving 0.225 + x = -0.707548585 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.225' to each side of the equation. 0.225 + -0.225 + x = -0.707548585 + -0.225 Combine like terms: 0.225 + -0.225 = 0.000 0.000 + x = -0.707548585 + -0.225 x = -0.707548585 + -0.225 Combine like terms: -0.707548585 + -0.225 = -0.932548585 x = -0.932548585 Simplifying x = -0.932548585

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.482548585, -0.932548585}

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