15x+14=x^2+12

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Solution for 15x+14=x^2+12 equation:


Simplifying
15x + 14 = x2 + 12

Reorder the terms:
14 + 15x = x2 + 12

Reorder the terms:
14 + 15x = 12 + x2

Solving
14 + 15x = 12 + x2

Solving for variable 'x'.

Reorder the terms:
14 + -12 + 15x + -1x2 = 12 + x2 + -12 + -1x2

Combine like terms: 14 + -12 = 2
2 + 15x + -1x2 = 12 + x2 + -12 + -1x2

Reorder the terms:
2 + 15x + -1x2 = 12 + -12 + x2 + -1x2

Combine like terms: 12 + -12 = 0
2 + 15x + -1x2 = 0 + x2 + -1x2
2 + 15x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
2 + 15x + -1x2 = 0

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

Divide each side by '-1'.
-2 + -15x + x2 = 0

Move the constant term to the right:

Add '2' to each side of the equation.
-2 + -15x + 2 + x2 = 0 + 2

Reorder the terms:
-2 + 2 + -15x + x2 = 0 + 2

Combine like terms: -2 + 2 = 0
0 + -15x + x2 = 0 + 2
-15x + x2 = 0 + 2

Combine like terms: 0 + 2 = 2
-15x + x2 = 2

The x term is -15x.  Take half its coefficient (-7.5).
Square it (56.25) and add it to both sides.

Add '56.25' to each side of the equation.
-15x + 56.25 + x2 = 2 + 56.25

Reorder the terms:
56.25 + -15x + x2 = 2 + 56.25

Combine like terms: 2 + 56.25 = 58.25
56.25 + -15x + x2 = 58.25

Factor a perfect square on the left side:
(x + -7.5)(x + -7.5) = 58.25

Calculate the square root of the right side: 7.632168761

Break this problem into two subproblems by setting 
(x + -7.5) equal to 7.632168761 and -7.632168761.

Subproblem 1

x + -7.5 = 7.632168761 Simplifying x + -7.5 = 7.632168761 Reorder the terms: -7.5 + x = 7.632168761 Solving -7.5 + x = 7.632168761 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7.5' to each side of the equation. -7.5 + 7.5 + x = 7.632168761 + 7.5 Combine like terms: -7.5 + 7.5 = 0.0 0.0 + x = 7.632168761 + 7.5 x = 7.632168761 + 7.5 Combine like terms: 7.632168761 + 7.5 = 15.132168761 x = 15.132168761 Simplifying x = 15.132168761

Subproblem 2

x + -7.5 = -7.632168761 Simplifying x + -7.5 = -7.632168761 Reorder the terms: -7.5 + x = -7.632168761 Solving -7.5 + x = -7.632168761 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7.5' to each side of the equation. -7.5 + 7.5 + x = -7.632168761 + 7.5 Combine like terms: -7.5 + 7.5 = 0.0 0.0 + x = -7.632168761 + 7.5 x = -7.632168761 + 7.5 Combine like terms: -7.632168761 + 7.5 = -0.132168761 x = -0.132168761 Simplifying x = -0.132168761

Solution

The solution to the problem is based on the solutions from the subproblems. x = {15.132168761, -0.132168761}

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