x^2-0.67x-2.89=0

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Solution for x^2-0.67x-2.89=0 equation:


Simplifying
x2 + -0.67x + -2.89 = 0

Reorder the terms:
-2.89 + -0.67x + x2 = 0

Solving
-2.89 + -0.67x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '2.89' to each side of the equation.
-2.89 + -0.67x + 2.89 + x2 = 0 + 2.89

Reorder the terms:
-2.89 + 2.89 + -0.67x + x2 = 0 + 2.89

Combine like terms: -2.89 + 2.89 = 0.00
0.00 + -0.67x + x2 = 0 + 2.89
-0.67x + x2 = 0 + 2.89

Combine like terms: 0 + 2.89 = 2.89
-0.67x + x2 = 2.89

The x term is -0.67x.  Take half its coefficient (-0.335).
Square it (0.112225) and add it to both sides.

Add '0.112225' to each side of the equation.
-0.67x + 0.112225 + x2 = 2.89 + 0.112225

Reorder the terms:
0.112225 + -0.67x + x2 = 2.89 + 0.112225

Combine like terms: 2.89 + 0.112225 = 3.002225
0.112225 + -0.67x + x2 = 3.002225

Factor a perfect square on the left side:
(x + -0.335)(x + -0.335) = 3.002225

Calculate the square root of the right side: 1.732692991

Break this problem into two subproblems by setting 
(x + -0.335) equal to 1.732692991 and -1.732692991.

Subproblem 1

x + -0.335 = 1.732692991 Simplifying x + -0.335 = 1.732692991 Reorder the terms: -0.335 + x = 1.732692991 Solving -0.335 + x = 1.732692991 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.335' to each side of the equation. -0.335 + 0.335 + x = 1.732692991 + 0.335 Combine like terms: -0.335 + 0.335 = 0.000 0.000 + x = 1.732692991 + 0.335 x = 1.732692991 + 0.335 Combine like terms: 1.732692991 + 0.335 = 2.067692991 x = 2.067692991 Simplifying x = 2.067692991

Subproblem 2

x + -0.335 = -1.732692991 Simplifying x + -0.335 = -1.732692991 Reorder the terms: -0.335 + x = -1.732692991 Solving -0.335 + x = -1.732692991 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.335' to each side of the equation. -0.335 + 0.335 + x = -1.732692991 + 0.335 Combine like terms: -0.335 + 0.335 = 0.000 0.000 + x = -1.732692991 + 0.335 x = -1.732692991 + 0.335 Combine like terms: -1.732692991 + 0.335 = -1.397692991 x = -1.397692991 Simplifying x = -1.397692991

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.067692991, -1.397692991}

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