x^2=1.94994-6.21x

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Solution for x^2=1.94994-6.21x equation:


Simplifying
x2 = 1.94994 + -6.21x

Solving
x2 = 1.94994 + -6.21x

Solving for variable 'x'.

Reorder the terms:
-1.94994 + 6.21x + x2 = 1.94994 + -6.21x + -1.94994 + 6.21x

Reorder the terms:
-1.94994 + 6.21x + x2 = 1.94994 + -1.94994 + -6.21x + 6.21x

Combine like terms: 1.94994 + -1.94994 = 0.00000
-1.94994 + 6.21x + x2 = 0.00000 + -6.21x + 6.21x
-1.94994 + 6.21x + x2 = -6.21x + 6.21x

Combine like terms: -6.21x + 6.21x = 0.00
-1.94994 + 6.21x + x2 = 0.00

Begin completing the square.

Move the constant term to the right:

Add '1.94994' to each side of the equation.
-1.94994 + 6.21x + 1.94994 + x2 = 0.00 + 1.94994

Reorder the terms:
-1.94994 + 1.94994 + 6.21x + x2 = 0.00 + 1.94994

Combine like terms: -1.94994 + 1.94994 = 0.00000
0.00000 + 6.21x + x2 = 0.00 + 1.94994
6.21x + x2 = 0.00 + 1.94994

Combine like terms: 0.00 + 1.94994 = 1.94994
6.21x + x2 = 1.94994

The x term is 6.21x.  Take half its coefficient (3.105).
Square it (9.641025) and add it to both sides.

Add '9.641025' to each side of the equation.
6.21x + 9.641025 + x2 = 1.94994 + 9.641025

Reorder the terms:
9.641025 + 6.21x + x2 = 1.94994 + 9.641025

Combine like terms: 1.94994 + 9.641025 = 11.590965
9.641025 + 6.21x + x2 = 11.590965

Factor a perfect square on the left side:
(x + 3.105)(x + 3.105) = 11.590965

Calculate the square root of the right side: 3.404550631

Break this problem into two subproblems by setting 
(x + 3.105) equal to 3.404550631 and -3.404550631.

Subproblem 1

x + 3.105 = 3.404550631 Simplifying x + 3.105 = 3.404550631 Reorder the terms: 3.105 + x = 3.404550631 Solving 3.105 + x = 3.404550631 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.105' to each side of the equation. 3.105 + -3.105 + x = 3.404550631 + -3.105 Combine like terms: 3.105 + -3.105 = 0.000 0.000 + x = 3.404550631 + -3.105 x = 3.404550631 + -3.105 Combine like terms: 3.404550631 + -3.105 = 0.299550631 x = 0.299550631 Simplifying x = 0.299550631

Subproblem 2

x + 3.105 = -3.404550631 Simplifying x + 3.105 = -3.404550631 Reorder the terms: 3.105 + x = -3.404550631 Solving 3.105 + x = -3.404550631 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.105' to each side of the equation. 3.105 + -3.105 + x = -3.404550631 + -3.105 Combine like terms: 3.105 + -3.105 = 0.000 0.000 + x = -3.404550631 + -3.105 x = -3.404550631 + -3.105 Combine like terms: -3.404550631 + -3.105 = -6.509550631 x = -6.509550631 Simplifying x = -6.509550631

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.299550631, -6.509550631}

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