x^2+14x-51=-7

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Solution for x^2+14x-51=-7 equation:


Simplifying
x2 + 14x + -51 = -7

Reorder the terms:
-51 + 14x + x2 = -7

Solving
-51 + 14x + x2 = -7

Solving for variable 'x'.

Reorder the terms:
-51 + 7 + 14x + x2 = -7 + 7

Combine like terms: -51 + 7 = -44
-44 + 14x + x2 = -7 + 7

Combine like terms: -7 + 7 = 0
-44 + 14x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '44' to each side of the equation.
-44 + 14x + 44 + x2 = 0 + 44

Reorder the terms:
-44 + 44 + 14x + x2 = 0 + 44

Combine like terms: -44 + 44 = 0
0 + 14x + x2 = 0 + 44
14x + x2 = 0 + 44

Combine like terms: 0 + 44 = 44
14x + x2 = 44

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 = 44 + 49

Reorder the terms:
49 + 14x + x2 = 44 + 49

Combine like terms: 44 + 49 = 93
49 + 14x + x2 = 93

Factor a perfect square on the left side:
(x + 7)(x + 7) = 93

Calculate the square root of the right side: 9.643650761

Break this problem into two subproblems by setting 
(x + 7) equal to 9.643650761 and -9.643650761.

Subproblem 1

x + 7 = 9.643650761 Simplifying x + 7 = 9.643650761 Reorder the terms: 7 + x = 9.643650761 Solving 7 + x = 9.643650761 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 = 9.643650761 + -7 Combine like terms: 7 + -7 = 0 0 + x = 9.643650761 + -7 x = 9.643650761 + -7 Combine like terms: 9.643650761 + -7 = 2.643650761 x = 2.643650761 Simplifying x = 2.643650761

Subproblem 2

x + 7 = -9.643650761 Simplifying x + 7 = -9.643650761 Reorder the terms: 7 + x = -9.643650761 Solving 7 + x = -9.643650761 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 = -9.643650761 + -7 Combine like terms: 7 + -7 = 0 0 + x = -9.643650761 + -7 x = -9.643650761 + -7 Combine like terms: -9.643650761 + -7 = -16.643650761 x = -16.643650761 Simplifying x = -16.643650761

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.643650761, -16.643650761}

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