242=x^2+14x

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Solution for 242=x^2+14x equation:


Simplifying
242 = x2 + 14x

Reorder the terms:
242 = 14x + x2

Solving
242 = 14x + x2

Solving for variable 'x'.

Reorder the terms:
242 + -14x + -1x2 = 14x + -14x + x2 + -1x2

Combine like terms: 14x + -14x = 0
242 + -14x + -1x2 = 0 + x2 + -1x2
242 + -14x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
242 + -14x + -1x2 = 0

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

Divide each side by '-1'.
-242 + 14x + x2 = 0

Move the constant term to the right:

Add '242' to each side of the equation.
-242 + 14x + 242 + x2 = 0 + 242

Reorder the terms:
-242 + 242 + 14x + x2 = 0 + 242

Combine like terms: -242 + 242 = 0
0 + 14x + x2 = 0 + 242
14x + x2 = 0 + 242

Combine like terms: 0 + 242 = 242
14x + x2 = 242

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 = 242 + 49

Reorder the terms:
49 + 14x + x2 = 242 + 49

Combine like terms: 242 + 49 = 291
49 + 14x + x2 = 291

Factor a perfect square on the left side:
(x + 7)(x + 7) = 291

Calculate the square root of the right side: 17.058722109

Break this problem into two subproblems by setting 
(x + 7) equal to 17.058722109 and -17.058722109.

Subproblem 1

x + 7 = 17.058722109 Simplifying x + 7 = 17.058722109 Reorder the terms: 7 + x = 17.058722109 Solving 7 + x = 17.058722109 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 = 17.058722109 + -7 Combine like terms: 7 + -7 = 0 0 + x = 17.058722109 + -7 x = 17.058722109 + -7 Combine like terms: 17.058722109 + -7 = 10.058722109 x = 10.058722109 Simplifying x = 10.058722109

Subproblem 2

x + 7 = -17.058722109 Simplifying x + 7 = -17.058722109 Reorder the terms: 7 + x = -17.058722109 Solving 7 + x = -17.058722109 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 = -17.058722109 + -7 Combine like terms: 7 + -7 = 0 0 + x = -17.058722109 + -7 x = -17.058722109 + -7 Combine like terms: -17.058722109 + -7 = -24.058722109 x = -24.058722109 Simplifying x = -24.058722109

Solution

The solution to the problem is based on the solutions from the subproblems. x = {10.058722109, -24.058722109}

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