x^2-4x-69=0

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Solution for x^2-4x-69=0 equation:


Simplifying
x2 + -4x + -69 = 0

Reorder the terms:
-69 + -4x + x2 = 0

Solving
-69 + -4x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '69' to each side of the equation.
-69 + -4x + 69 + x2 = 0 + 69

Reorder the terms:
-69 + 69 + -4x + x2 = 0 + 69

Combine like terms: -69 + 69 = 0
0 + -4x + x2 = 0 + 69
-4x + x2 = 0 + 69

Combine like terms: 0 + 69 = 69
-4x + x2 = 69

The x term is -4x.  Take half its coefficient (-2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
-4x + 4 + x2 = 69 + 4

Reorder the terms:
4 + -4x + x2 = 69 + 4

Combine like terms: 69 + 4 = 73
4 + -4x + x2 = 73

Factor a perfect square on the left side:
(x + -2)(x + -2) = 73

Calculate the square root of the right side: 8.544003745

Break this problem into two subproblems by setting 
(x + -2) equal to 8.544003745 and -8.544003745.

Subproblem 1

x + -2 = 8.544003745 Simplifying x + -2 = 8.544003745 Reorder the terms: -2 + x = 8.544003745 Solving -2 + x = 8.544003745 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + x = 8.544003745 + 2 Combine like terms: -2 + 2 = 0 0 + x = 8.544003745 + 2 x = 8.544003745 + 2 Combine like terms: 8.544003745 + 2 = 10.544003745 x = 10.544003745 Simplifying x = 10.544003745

Subproblem 2

x + -2 = -8.544003745 Simplifying x + -2 = -8.544003745 Reorder the terms: -2 + x = -8.544003745 Solving -2 + x = -8.544003745 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + x = -8.544003745 + 2 Combine like terms: -2 + 2 = 0 0 + x = -8.544003745 + 2 x = -8.544003745 + 2 Combine like terms: -8.544003745 + 2 = -6.544003745 x = -6.544003745 Simplifying x = -6.544003745

Solution

The solution to the problem is based on the solutions from the subproblems. x = {10.544003745, -6.544003745}

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