0.08x^2+2x=6

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Solution for 0.08x^2+2x=6 equation:


Simplifying
0.08x2 + 2x = 6

Reorder the terms:
2x + 0.08x2 = 6

Solving
2x + 0.08x2 = 6

Solving for variable 'x'.

Reorder the terms:
-6 + 2x + 0.08x2 = 6 + -6

Combine like terms: 6 + -6 = 0
-6 + 2x + 0.08x2 = 0

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

Divide each side by '0.08'.
-75 + 25x + x2 = 0

Move the constant term to the right:

Add '75' to each side of the equation.
-75 + 25x + 75 + x2 = 0 + 75

Reorder the terms:
-75 + 75 + 25x + x2 = 0 + 75

Combine like terms: -75 + 75 = 0
0 + 25x + x2 = 0 + 75
25x + x2 = 0 + 75

Combine like terms: 0 + 75 = 75
25x + x2 = 75

The x term is 25x.  Take half its coefficient (12.5).
Square it (156.25) and add it to both sides.

Add '156.25' to each side of the equation.
25x + 156.25 + x2 = 75 + 156.25

Reorder the terms:
156.25 + 25x + x2 = 75 + 156.25

Combine like terms: 75 + 156.25 = 231.25
156.25 + 25x + x2 = 231.25

Factor a perfect square on the left side:
(x + 12.5)(x + 12.5) = 231.25

Calculate the square root of the right side: 15.206906326

Break this problem into two subproblems by setting 
(x + 12.5) equal to 15.206906326 and -15.206906326.

Subproblem 1

x + 12.5 = 15.206906326 Simplifying x + 12.5 = 15.206906326 Reorder the terms: 12.5 + x = 15.206906326 Solving 12.5 + x = 15.206906326 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-12.5' to each side of the equation. 12.5 + -12.5 + x = 15.206906326 + -12.5 Combine like terms: 12.5 + -12.5 = 0.0 0.0 + x = 15.206906326 + -12.5 x = 15.206906326 + -12.5 Combine like terms: 15.206906326 + -12.5 = 2.706906326 x = 2.706906326 Simplifying x = 2.706906326

Subproblem 2

x + 12.5 = -15.206906326 Simplifying x + 12.5 = -15.206906326 Reorder the terms: 12.5 + x = -15.206906326 Solving 12.5 + x = -15.206906326 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-12.5' to each side of the equation. 12.5 + -12.5 + x = -15.206906326 + -12.5 Combine like terms: 12.5 + -12.5 = 0.0 0.0 + x = -15.206906326 + -12.5 x = -15.206906326 + -12.5 Combine like terms: -15.206906326 + -12.5 = -27.706906326 x = -27.706906326 Simplifying x = -27.706906326

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.706906326, -27.706906326}

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