0.33x^2-(-2.5x)+1=0

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Solution for 0.33x^2-(-2.5x)+1=0 equation:


Simplifying
0.33x2 + -1(-2.5x) + 1 = 0

Remove parenthesis around (-2.5x)
0.33x2 + -1 * -2.5x + 1 = 0

Multiply -1 * -2.5
0.33x2 + 2.5x + 1 = 0

Reorder the terms:
1 + 2.5x + 0.33x2 = 0

Solving
1 + 2.5x + 0.33x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
0.33 the coefficient of the squared term: 

Divide each side by '0.33'.
3.03030303 + 7.575757576x + x2 = 0

Move the constant term to the right:

Add '-3.03030303' to each side of the equation.
3.03030303 + 7.575757576x + -3.03030303 + x2 = 0 + -3.03030303

Reorder the terms:
3.03030303 + -3.03030303 + 7.575757576x + x2 = 0 + -3.03030303

Combine like terms: 3.03030303 + -3.03030303 = 0.00000000
0.00000000 + 7.575757576x + x2 = 0 + -3.03030303
7.575757576x + x2 = 0 + -3.03030303

Combine like terms: 0 + -3.03030303 = -3.03030303
7.575757576x + x2 = -3.03030303

The x term is 7.575757576x.  Take half its coefficient (3.787878788).
Square it (14.34802571) and add it to both sides.

Add '14.34802571' to each side of the equation.
7.575757576x + 14.34802571 + x2 = -3.03030303 + 14.34802571

Reorder the terms:
14.34802571 + 7.575757576x + x2 = -3.03030303 + 14.34802571

Combine like terms: -3.03030303 + 14.34802571 = 11.31772268
14.34802571 + 7.575757576x + x2 = 11.31772268

Factor a perfect square on the left side:
(x + 3.787878788)(x + 3.787878788) = 11.31772268

Calculate the square root of the right side: 3.36418232

Break this problem into two subproblems by setting 
(x + 3.787878788) equal to 3.36418232 and -3.36418232.

Subproblem 1

x + 3.787878788 = 3.36418232 Simplifying x + 3.787878788 = 3.36418232 Reorder the terms: 3.787878788 + x = 3.36418232 Solving 3.787878788 + x = 3.36418232 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.787878788' to each side of the equation. 3.787878788 + -3.787878788 + x = 3.36418232 + -3.787878788 Combine like terms: 3.787878788 + -3.787878788 = 0.000000000 0.000000000 + x = 3.36418232 + -3.787878788 x = 3.36418232 + -3.787878788 Combine like terms: 3.36418232 + -3.787878788 = -0.423696468 x = -0.423696468 Simplifying x = -0.423696468

Subproblem 2

x + 3.787878788 = -3.36418232 Simplifying x + 3.787878788 = -3.36418232 Reorder the terms: 3.787878788 + x = -3.36418232 Solving 3.787878788 + x = -3.36418232 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.787878788' to each side of the equation. 3.787878788 + -3.787878788 + x = -3.36418232 + -3.787878788 Combine like terms: 3.787878788 + -3.787878788 = 0.000000000 0.000000000 + x = -3.36418232 + -3.787878788 x = -3.36418232 + -3.787878788 Combine like terms: -3.36418232 + -3.787878788 = -7.152061108 x = -7.152061108 Simplifying x = -7.152061108

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.423696468, -7.152061108}

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