x^2+4x-68=0

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Solution for x^2+4x-68=0 equation:


Simplifying
x2 + 4x + -68 = 0

Reorder the terms:
-68 + 4x + x2 = 0

Solving
-68 + 4x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '68' to each side of the equation.
-68 + 4x + 68 + x2 = 0 + 68

Reorder the terms:
-68 + 68 + 4x + x2 = 0 + 68

Combine like terms: -68 + 68 = 0
0 + 4x + x2 = 0 + 68
4x + x2 = 0 + 68

Combine like terms: 0 + 68 = 68
4x + x2 = 68

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 = 68 + 4

Reorder the terms:
4 + 4x + x2 = 68 + 4

Combine like terms: 68 + 4 = 72
4 + 4x + x2 = 72

Factor a perfect square on the left side:
(x + 2)(x + 2) = 72

Calculate the square root of the right side: 8.485281374

Break this problem into two subproblems by setting 
(x + 2) equal to 8.485281374 and -8.485281374.

Subproblem 1

x + 2 = 8.485281374 Simplifying x + 2 = 8.485281374 Reorder the terms: 2 + x = 8.485281374 Solving 2 + x = 8.485281374 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 = 8.485281374 + -2 Combine like terms: 2 + -2 = 0 0 + x = 8.485281374 + -2 x = 8.485281374 + -2 Combine like terms: 8.485281374 + -2 = 6.485281374 x = 6.485281374 Simplifying x = 6.485281374

Subproblem 2

x + 2 = -8.485281374 Simplifying x + 2 = -8.485281374 Reorder the terms: 2 + x = -8.485281374 Solving 2 + x = -8.485281374 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 = -8.485281374 + -2 Combine like terms: 2 + -2 = 0 0 + x = -8.485281374 + -2 x = -8.485281374 + -2 Combine like terms: -8.485281374 + -2 = -10.485281374 x = -10.485281374 Simplifying x = -10.485281374

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.485281374, -10.485281374}

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