x^2=-14x+4

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Solution for x^2=-14x+4 equation:


Simplifying
x2 = -14x + 4

Reorder the terms:
x2 = 4 + -14x

Solving
x2 = 4 + -14x

Solving for variable 'x'.

Reorder the terms:
-4 + 14x + x2 = 4 + -14x + -4 + 14x

Reorder the terms:
-4 + 14x + x2 = 4 + -4 + -14x + 14x

Combine like terms: 4 + -4 = 0
-4 + 14x + x2 = 0 + -14x + 14x
-4 + 14x + x2 = -14x + 14x

Combine like terms: -14x + 14x = 0
-4 + 14x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '4' to each side of the equation.
-4 + 14x + 4 + x2 = 0 + 4

Reorder the terms:
-4 + 4 + 14x + x2 = 0 + 4

Combine like terms: -4 + 4 = 0
0 + 14x + x2 = 0 + 4
14x + x2 = 0 + 4

Combine like terms: 0 + 4 = 4
14x + x2 = 4

The x term is 14x.  Take half its coefficient (7).
Square it (49) and add it to both sides.

Add '49' to each side of the equation.
14x + 49 + x2 = 4 + 49

Reorder the terms:
49 + 14x + x2 = 4 + 49

Combine like terms: 4 + 49 = 53
49 + 14x + x2 = 53

Factor a perfect square on the left side:
(x + 7)(x + 7) = 53

Calculate the square root of the right side: 7.280109889

Break this problem into two subproblems by setting 
(x + 7) equal to 7.280109889 and -7.280109889.

Subproblem 1

x + 7 = 7.280109889 Simplifying x + 7 = 7.280109889 Reorder the terms: 7 + x = 7.280109889 Solving 7 + x = 7.280109889 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + x = 7.280109889 + -7 Combine like terms: 7 + -7 = 0 0 + x = 7.280109889 + -7 x = 7.280109889 + -7 Combine like terms: 7.280109889 + -7 = 0.280109889 x = 0.280109889 Simplifying x = 0.280109889

Subproblem 2

x + 7 = -7.280109889 Simplifying x + 7 = -7.280109889 Reorder the terms: 7 + x = -7.280109889 Solving 7 + x = -7.280109889 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + x = -7.280109889 + -7 Combine like terms: 7 + -7 = 0 0 + x = -7.280109889 + -7 x = -7.280109889 + -7 Combine like terms: -7.280109889 + -7 = -14.280109889 x = -14.280109889 Simplifying x = -14.280109889

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.280109889, -14.280109889}

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