2x^2+6x+6=25

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Solution for 2x^2+6x+6=25 equation:


Simplifying
2x2 + 6x + 6 = 25

Reorder the terms:
6 + 6x + 2x2 = 25

Solving
6 + 6x + 2x2 = 25

Solving for variable 'x'.

Reorder the terms:
6 + -25 + 6x + 2x2 = 25 + -25

Combine like terms: 6 + -25 = -19
-19 + 6x + 2x2 = 25 + -25

Combine like terms: 25 + -25 = 0
-19 + 6x + 2x2 = 0

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

Divide each side by '2'.
-9.5 + 3x + x2 = 0

Move the constant term to the right:

Add '9.5' to each side of the equation.
-9.5 + 3x + 9.5 + x2 = 0 + 9.5

Reorder the terms:
-9.5 + 9.5 + 3x + x2 = 0 + 9.5

Combine like terms: -9.5 + 9.5 = 0.0
0.0 + 3x + x2 = 0 + 9.5
3x + x2 = 0 + 9.5

Combine like terms: 0 + 9.5 = 9.5
3x + x2 = 9.5

The x term is 3x.  Take half its coefficient (1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
3x + 2.25 + x2 = 9.5 + 2.25

Reorder the terms:
2.25 + 3x + x2 = 9.5 + 2.25

Combine like terms: 9.5 + 2.25 = 11.75
2.25 + 3x + x2 = 11.75

Factor a perfect square on the left side:
(x + 1.5)(x + 1.5) = 11.75

Calculate the square root of the right side: 3.4278273

Break this problem into two subproblems by setting 
(x + 1.5) equal to 3.4278273 and -3.4278273.

Subproblem 1

x + 1.5 = 3.4278273 Simplifying x + 1.5 = 3.4278273 Reorder the terms: 1.5 + x = 3.4278273 Solving 1.5 + x = 3.4278273 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + x = 3.4278273 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = 3.4278273 + -1.5 x = 3.4278273 + -1.5 Combine like terms: 3.4278273 + -1.5 = 1.9278273 x = 1.9278273 Simplifying x = 1.9278273

Subproblem 2

x + 1.5 = -3.4278273 Simplifying x + 1.5 = -3.4278273 Reorder the terms: 1.5 + x = -3.4278273 Solving 1.5 + x = -3.4278273 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + x = -3.4278273 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = -3.4278273 + -1.5 x = -3.4278273 + -1.5 Combine like terms: -3.4278273 + -1.5 = -4.9278273 x = -4.9278273 Simplifying x = -4.9278273

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.9278273, -4.9278273}

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