x^2-14x-75=8

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Solution for x^2-14x-75=8 equation:


Simplifying
x2 + -14x + -75 = 8

Reorder the terms:
-75 + -14x + x2 = 8

Solving
-75 + -14x + x2 = 8

Solving for variable 'x'.

Reorder the terms:
-75 + -8 + -14x + x2 = 8 + -8

Combine like terms: -75 + -8 = -83
-83 + -14x + x2 = 8 + -8

Combine like terms: 8 + -8 = 0
-83 + -14x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '83' to each side of the equation.
-83 + -14x + 83 + x2 = 0 + 83

Reorder the terms:
-83 + 83 + -14x + x2 = 0 + 83

Combine like terms: -83 + 83 = 0
0 + -14x + x2 = 0 + 83
-14x + x2 = 0 + 83

Combine like terms: 0 + 83 = 83
-14x + x2 = 83

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 = 83 + 49

Reorder the terms:
49 + -14x + x2 = 83 + 49

Combine like terms: 83 + 49 = 132
49 + -14x + x2 = 132

Factor a perfect square on the left side:
(x + -7)(x + -7) = 132

Calculate the square root of the right side: 11.489125293

Break this problem into two subproblems by setting 
(x + -7) equal to 11.489125293 and -11.489125293.

Subproblem 1

x + -7 = 11.489125293 Simplifying x + -7 = 11.489125293 Reorder the terms: -7 + x = 11.489125293 Solving -7 + x = 11.489125293 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 = 11.489125293 + 7 Combine like terms: -7 + 7 = 0 0 + x = 11.489125293 + 7 x = 11.489125293 + 7 Combine like terms: 11.489125293 + 7 = 18.489125293 x = 18.489125293 Simplifying x = 18.489125293

Subproblem 2

x + -7 = -11.489125293 Simplifying x + -7 = -11.489125293 Reorder the terms: -7 + x = -11.489125293 Solving -7 + x = -11.489125293 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 = -11.489125293 + 7 Combine like terms: -7 + 7 = 0 0 + x = -11.489125293 + 7 x = -11.489125293 + 7 Combine like terms: -11.489125293 + 7 = -4.489125293 x = -4.489125293 Simplifying x = -4.489125293

Solution

The solution to the problem is based on the solutions from the subproblems. x = {18.489125293, -4.489125293}

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