2x^2+4x=266

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Solution for 2x^2+4x=266 equation:


Simplifying
2x2 + 4x = 266

Reorder the terms:
4x + 2x2 = 266

Solving
4x + 2x2 = 266

Solving for variable 'x'.

Reorder the terms:
-266 + 4x + 2x2 = 266 + -266

Combine like terms: 266 + -266 = 0
-266 + 4x + 2x2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(-133 + 2x + x2) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(-133 + 2x + x2)' equal to zero and attempt to solve: Simplifying -133 + 2x + x2 = 0 Solving -133 + 2x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '133' to each side of the equation. -133 + 2x + 133 + x2 = 0 + 133 Reorder the terms: -133 + 133 + 2x + x2 = 0 + 133 Combine like terms: -133 + 133 = 0 0 + 2x + x2 = 0 + 133 2x + x2 = 0 + 133 Combine like terms: 0 + 133 = 133 2x + x2 = 133 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 = 133 + 1 Reorder the terms: 1 + 2x + x2 = 133 + 1 Combine like terms: 133 + 1 = 134 1 + 2x + x2 = 134 Factor a perfect square on the left side: (x + 1)(x + 1) = 134 Calculate the square root of the right side: 11.575836903 Break this problem into two subproblems by setting (x + 1) equal to 11.575836903 and -11.575836903.

Subproblem 1

x + 1 = 11.575836903 Simplifying x + 1 = 11.575836903 Reorder the terms: 1 + x = 11.575836903 Solving 1 + x = 11.575836903 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 = 11.575836903 + -1 Combine like terms: 1 + -1 = 0 0 + x = 11.575836903 + -1 x = 11.575836903 + -1 Combine like terms: 11.575836903 + -1 = 10.575836903 x = 10.575836903 Simplifying x = 10.575836903

Subproblem 2

x + 1 = -11.575836903 Simplifying x + 1 = -11.575836903 Reorder the terms: 1 + x = -11.575836903 Solving 1 + x = -11.575836903 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 = -11.575836903 + -1 Combine like terms: 1 + -1 = 0 0 + x = -11.575836903 + -1 x = -11.575836903 + -1 Combine like terms: -11.575836903 + -1 = -12.575836903 x = -12.575836903 Simplifying x = -12.575836903

Solution

The solution to the problem is based on the solutions from the subproblems. x = {10.575836903, -12.575836903}

Solution

x = {10.575836903, -12.575836903}

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