x^2+4x=930

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Solution for x^2+4x=930 equation:


Simplifying
x2 + 4x = 930

Reorder the terms:
4x + x2 = 930

Solving
4x + x2 = 930

Solving for variable 'x'.

Reorder the terms:
-930 + 4x + x2 = 930 + -930

Combine like terms: 930 + -930 = 0
-930 + 4x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '930' to each side of the equation.
-930 + 4x + 930 + x2 = 0 + 930

Reorder the terms:
-930 + 930 + 4x + x2 = 0 + 930

Combine like terms: -930 + 930 = 0
0 + 4x + x2 = 0 + 930
4x + x2 = 0 + 930

Combine like terms: 0 + 930 = 930
4x + x2 = 930

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 = 930 + 4

Reorder the terms:
4 + 4x + x2 = 930 + 4

Combine like terms: 930 + 4 = 934
4 + 4x + x2 = 934

Factor a perfect square on the left side:
(x + 2)(x + 2) = 934

Calculate the square root of the right side: 30.56141358

Break this problem into two subproblems by setting 
(x + 2) equal to 30.56141358 and -30.56141358.

Subproblem 1

x + 2 = 30.56141358 Simplifying x + 2 = 30.56141358 Reorder the terms: 2 + x = 30.56141358 Solving 2 + x = 30.56141358 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 = 30.56141358 + -2 Combine like terms: 2 + -2 = 0 0 + x = 30.56141358 + -2 x = 30.56141358 + -2 Combine like terms: 30.56141358 + -2 = 28.56141358 x = 28.56141358 Simplifying x = 28.56141358

Subproblem 2

x + 2 = -30.56141358 Simplifying x + 2 = -30.56141358 Reorder the terms: 2 + x = -30.56141358 Solving 2 + x = -30.56141358 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 = -30.56141358 + -2 Combine like terms: 2 + -2 = 0 0 + x = -30.56141358 + -2 x = -30.56141358 + -2 Combine like terms: -30.56141358 + -2 = -32.56141358 x = -32.56141358 Simplifying x = -32.56141358

Solution

The solution to the problem is based on the solutions from the subproblems. x = {28.56141358, -32.56141358}

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