x^2+2x-67=0

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Solution for x^2+2x-67=0 equation:


Simplifying
x2 + 2x + -67 = 0

Reorder the terms:
-67 + 2x + x2 = 0

Solving
-67 + 2x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '67' to each side of the equation.
-67 + 2x + 67 + x2 = 0 + 67

Reorder the terms:
-67 + 67 + 2x + x2 = 0 + 67

Combine like terms: -67 + 67 = 0
0 + 2x + x2 = 0 + 67
2x + x2 = 0 + 67

Combine like terms: 0 + 67 = 67
2x + x2 = 67

The x term is 2x.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2x + 1 + x2 = 67 + 1

Reorder the terms:
1 + 2x + x2 = 67 + 1

Combine like terms: 67 + 1 = 68
1 + 2x + x2 = 68

Factor a perfect square on the left side:
(x + 1)(x + 1) = 68

Calculate the square root of the right side: 8.246211251

Break this problem into two subproblems by setting 
(x + 1) equal to 8.246211251 and -8.246211251.

Subproblem 1

x + 1 = 8.246211251 Simplifying x + 1 = 8.246211251 Reorder the terms: 1 + x = 8.246211251 Solving 1 + x = 8.246211251 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = 8.246211251 + -1 Combine like terms: 1 + -1 = 0 0 + x = 8.246211251 + -1 x = 8.246211251 + -1 Combine like terms: 8.246211251 + -1 = 7.246211251 x = 7.246211251 Simplifying x = 7.246211251

Subproblem 2

x + 1 = -8.246211251 Simplifying x + 1 = -8.246211251 Reorder the terms: 1 + x = -8.246211251 Solving 1 + x = -8.246211251 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = -8.246211251 + -1 Combine like terms: 1 + -1 = 0 0 + x = -8.246211251 + -1 x = -8.246211251 + -1 Combine like terms: -8.246211251 + -1 = -9.246211251 x = -9.246211251 Simplifying x = -9.246211251

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.246211251, -9.246211251}

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