2x^2+4x-69=

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


Simplifying
2x2 + 4x + -69 = 0

Reorder the terms:
-69 + 4x + 2x2 = 0

Solving
-69 + 4x + 2x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
2 the coefficient of the squared term: 

Divide each side by '2'.
-34.5 + 2x + x2 = 0

Move the constant term to the right:

Add '34.5' to each side of the equation.
-34.5 + 2x + 34.5 + x2 = 0 + 34.5

Reorder the terms:
-34.5 + 34.5 + 2x + x2 = 0 + 34.5

Combine like terms: -34.5 + 34.5 = 0.0
0.0 + 2x + x2 = 0 + 34.5
2x + x2 = 0 + 34.5

Combine like terms: 0 + 34.5 = 34.5
2x + x2 = 34.5

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 = 34.5 + 1

Reorder the terms:
1 + 2x + x2 = 34.5 + 1

Combine like terms: 34.5 + 1 = 35.5
1 + 2x + x2 = 35.5

Factor a perfect square on the left side:
(x + 1)(x + 1) = 35.5

Calculate the square root of the right side: 5.958187644

Break this problem into two subproblems by setting 
(x + 1) equal to 5.958187644 and -5.958187644.

Subproblem 1

x + 1 = 5.958187644 Simplifying x + 1 = 5.958187644 Reorder the terms: 1 + x = 5.958187644 Solving 1 + x = 5.958187644 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 = 5.958187644 + -1 Combine like terms: 1 + -1 = 0 0 + x = 5.958187644 + -1 x = 5.958187644 + -1 Combine like terms: 5.958187644 + -1 = 4.958187644 x = 4.958187644 Simplifying x = 4.958187644

Subproblem 2

x + 1 = -5.958187644 Simplifying x + 1 = -5.958187644 Reorder the terms: 1 + x = -5.958187644 Solving 1 + x = -5.958187644 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 = -5.958187644 + -1 Combine like terms: 1 + -1 = 0 0 + x = -5.958187644 + -1 x = -5.958187644 + -1 Combine like terms: -5.958187644 + -1 = -6.958187644 x = -6.958187644 Simplifying x = -6.958187644

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.958187644, -6.958187644}

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