X^2+12X+7=2

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Solution for X^2+12X+7=2 equation:


Simplifying
X2 + 12X + 7 = 2

Reorder the terms:
7 + 12X + X2 = 2

Solving
7 + 12X + X2 = 2

Solving for variable 'X'.

Reorder the terms:
7 + -2 + 12X + X2 = 2 + -2

Combine like terms: 7 + -2 = 5
5 + 12X + X2 = 2 + -2

Combine like terms: 2 + -2 = 0
5 + 12X + X2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-5' to each side of the equation.
5 + 12X + -5 + X2 = 0 + -5

Reorder the terms:
5 + -5 + 12X + X2 = 0 + -5

Combine like terms: 5 + -5 = 0
0 + 12X + X2 = 0 + -5
12X + X2 = 0 + -5

Combine like terms: 0 + -5 = -5
12X + X2 = -5

The X term is 12X.  Take half its coefficient (6).
Square it (36) and add it to both sides.

Add '36' to each side of the equation.
12X + 36 + X2 = -5 + 36

Reorder the terms:
36 + 12X + X2 = -5 + 36

Combine like terms: -5 + 36 = 31
36 + 12X + X2 = 31

Factor a perfect square on the left side:
(X + 6)(X + 6) = 31

Calculate the square root of the right side: 5.567764363

Break this problem into two subproblems by setting 
(X + 6) equal to 5.567764363 and -5.567764363.

Subproblem 1

X + 6 = 5.567764363 Simplifying X + 6 = 5.567764363 Reorder the terms: 6 + X = 5.567764363 Solving 6 + X = 5.567764363 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + X = 5.567764363 + -6 Combine like terms: 6 + -6 = 0 0 + X = 5.567764363 + -6 X = 5.567764363 + -6 Combine like terms: 5.567764363 + -6 = -0.432235637 X = -0.432235637 Simplifying X = -0.432235637

Subproblem 2

X + 6 = -5.567764363 Simplifying X + 6 = -5.567764363 Reorder the terms: 6 + X = -5.567764363 Solving 6 + X = -5.567764363 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + X = -5.567764363 + -6 Combine like terms: 6 + -6 = 0 0 + X = -5.567764363 + -6 X = -5.567764363 + -6 Combine like terms: -5.567764363 + -6 = -11.567764363 X = -11.567764363 Simplifying X = -11.567764363

Solution

The solution to the problem is based on the solutions from the subproblems. X = {-0.432235637, -11.567764363}

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