0=X^2+12X-3

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Solution for 0=X^2+12X-3 equation:


Simplifying
0 = X2 + 12X + -3

Reorder the terms:
0 = -3 + 12X + X2

Solving
0 = -3 + 12X + X2

Solving for variable 'X'.

Combine like terms: 0 + 3 = 3
3 + -12X + -1X2 = -3 + 12X + X2 + 3 + -12X + -1X2

Reorder the terms:
3 + -12X + -1X2 = -3 + 3 + 12X + -12X + X2 + -1X2

Combine like terms: -3 + 3 = 0
3 + -12X + -1X2 = 0 + 12X + -12X + X2 + -1X2
3 + -12X + -1X2 = 12X + -12X + X2 + -1X2

Combine like terms: 12X + -12X = 0
3 + -12X + -1X2 = 0 + X2 + -1X2
3 + -12X + -1X2 = X2 + -1X2

Combine like terms: X2 + -1X2 = 0
3 + -12X + -1X2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-3 + 12X + X2 = 0

Move the constant term to the right:

Add '3' to each side of the equation.
-3 + 12X + 3 + X2 = 0 + 3

Reorder the terms:
-3 + 3 + 12X + X2 = 0 + 3

Combine like terms: -3 + 3 = 0
0 + 12X + X2 = 0 + 3
12X + X2 = 0 + 3

Combine like terms: 0 + 3 = 3
12X + X2 = 3

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 = 3 + 36

Reorder the terms:
36 + 12X + X2 = 3 + 36

Combine like terms: 3 + 36 = 39
36 + 12X + X2 = 39

Factor a perfect square on the left side:
(X + 6)(X + 6) = 39

Calculate the square root of the right side: 6.244997998

Break this problem into two subproblems by setting 
(X + 6) equal to 6.244997998 and -6.244997998.

Subproblem 1

X + 6 = 6.244997998 Simplifying X + 6 = 6.244997998 Reorder the terms: 6 + X = 6.244997998 Solving 6 + X = 6.244997998 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 = 6.244997998 + -6 Combine like terms: 6 + -6 = 0 0 + X = 6.244997998 + -6 X = 6.244997998 + -6 Combine like terms: 6.244997998 + -6 = 0.244997998 X = 0.244997998 Simplifying X = 0.244997998

Subproblem 2

X + 6 = -6.244997998 Simplifying X + 6 = -6.244997998 Reorder the terms: 6 + X = -6.244997998 Solving 6 + X = -6.244997998 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 = -6.244997998 + -6 Combine like terms: 6 + -6 = 0 0 + X = -6.244997998 + -6 X = -6.244997998 + -6 Combine like terms: -6.244997998 + -6 = -12.244997998 X = -12.244997998 Simplifying X = -12.244997998

Solution

The solution to the problem is based on the solutions from the subproblems. X = {0.244997998, -12.244997998}

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