x^2-1=14x+5

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Solution for x^2-1=14x+5 equation:


Simplifying
x2 + -1 = 14x + 5

Reorder the terms:
-1 + x2 = 14x + 5

Reorder the terms:
-1 + x2 = 5 + 14x

Solving
-1 + x2 = 5 + 14x

Solving for variable 'x'.

Reorder the terms:
-1 + -5 + -14x + x2 = 5 + 14x + -5 + -14x

Combine like terms: -1 + -5 = -6
-6 + -14x + x2 = 5 + 14x + -5 + -14x

Reorder the terms:
-6 + -14x + x2 = 5 + -5 + 14x + -14x

Combine like terms: 5 + -5 = 0
-6 + -14x + x2 = 0 + 14x + -14x
-6 + -14x + x2 = 14x + -14x

Combine like terms: 14x + -14x = 0
-6 + -14x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '6' to each side of the equation.
-6 + -14x + 6 + x2 = 0 + 6

Reorder the terms:
-6 + 6 + -14x + x2 = 0 + 6

Combine like terms: -6 + 6 = 0
0 + -14x + x2 = 0 + 6
-14x + x2 = 0 + 6

Combine like terms: 0 + 6 = 6
-14x + x2 = 6

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 = 6 + 49

Reorder the terms:
49 + -14x + x2 = 6 + 49

Combine like terms: 6 + 49 = 55
49 + -14x + x2 = 55

Factor a perfect square on the left side:
(x + -7)(x + -7) = 55

Calculate the square root of the right side: 7.416198487

Break this problem into two subproblems by setting 
(x + -7) equal to 7.416198487 and -7.416198487.

Subproblem 1

x + -7 = 7.416198487 Simplifying x + -7 = 7.416198487 Reorder the terms: -7 + x = 7.416198487 Solving -7 + x = 7.416198487 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 = 7.416198487 + 7 Combine like terms: -7 + 7 = 0 0 + x = 7.416198487 + 7 x = 7.416198487 + 7 Combine like terms: 7.416198487 + 7 = 14.416198487 x = 14.416198487 Simplifying x = 14.416198487

Subproblem 2

x + -7 = -7.416198487 Simplifying x + -7 = -7.416198487 Reorder the terms: -7 + x = -7.416198487 Solving -7 + x = -7.416198487 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 = -7.416198487 + 7 Combine like terms: -7 + 7 = 0 0 + x = -7.416198487 + 7 x = -7.416198487 + 7 Combine like terms: -7.416198487 + 7 = -0.416198487 x = -0.416198487 Simplifying x = -0.416198487

Solution

The solution to the problem is based on the solutions from the subproblems. x = {14.416198487, -0.416198487}

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