x^2+4x=37

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Solution for x^2+4x=37 equation:


Simplifying
x2 + 4x = 37

Reorder the terms:
4x + x2 = 37

Solving
4x + x2 = 37

Solving for variable 'x'.

Reorder the terms:
-37 + 4x + x2 = 37 + -37

Combine like terms: 37 + -37 = 0
-37 + 4x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '37' to each side of the equation.
-37 + 4x + 37 + x2 = 0 + 37

Reorder the terms:
-37 + 37 + 4x + x2 = 0 + 37

Combine like terms: -37 + 37 = 0
0 + 4x + x2 = 0 + 37
4x + x2 = 0 + 37

Combine like terms: 0 + 37 = 37
4x + x2 = 37

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 = 37 + 4

Reorder the terms:
4 + 4x + x2 = 37 + 4

Combine like terms: 37 + 4 = 41
4 + 4x + x2 = 41

Factor a perfect square on the left side:
(x + 2)(x + 2) = 41

Calculate the square root of the right side: 6.403124237

Break this problem into two subproblems by setting 
(x + 2) equal to 6.403124237 and -6.403124237.

Subproblem 1

x + 2 = 6.403124237 Simplifying x + 2 = 6.403124237 Reorder the terms: 2 + x = 6.403124237 Solving 2 + x = 6.403124237 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 = 6.403124237 + -2 Combine like terms: 2 + -2 = 0 0 + x = 6.403124237 + -2 x = 6.403124237 + -2 Combine like terms: 6.403124237 + -2 = 4.403124237 x = 4.403124237 Simplifying x = 4.403124237

Subproblem 2

x + 2 = -6.403124237 Simplifying x + 2 = -6.403124237 Reorder the terms: 2 + x = -6.403124237 Solving 2 + x = -6.403124237 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 = -6.403124237 + -2 Combine like terms: 2 + -2 = 0 0 + x = -6.403124237 + -2 x = -6.403124237 + -2 Combine like terms: -6.403124237 + -2 = -8.403124237 x = -8.403124237 Simplifying x = -8.403124237

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.403124237, -8.403124237}

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