x^2+4x=960

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Solution for x^2+4x=960 equation:


Simplifying
x2 + 4x = 960

Reorder the terms:
4x + x2 = 960

Solving
4x + x2 = 960

Solving for variable 'x'.

Reorder the terms:
-960 + 4x + x2 = 960 + -960

Combine like terms: 960 + -960 = 0
-960 + 4x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '960' to each side of the equation.
-960 + 4x + 960 + x2 = 0 + 960

Reorder the terms:
-960 + 960 + 4x + x2 = 0 + 960

Combine like terms: -960 + 960 = 0
0 + 4x + x2 = 0 + 960
4x + x2 = 0 + 960

Combine like terms: 0 + 960 = 960
4x + x2 = 960

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 = 960 + 4

Reorder the terms:
4 + 4x + x2 = 960 + 4

Combine like terms: 960 + 4 = 964
4 + 4x + x2 = 964

Factor a perfect square on the left side:
(x + 2)(x + 2) = 964

Calculate the square root of the right side: 31.048349393

Break this problem into two subproblems by setting 
(x + 2) equal to 31.048349393 and -31.048349393.

Subproblem 1

x + 2 = 31.048349393 Simplifying x + 2 = 31.048349393 Reorder the terms: 2 + x = 31.048349393 Solving 2 + x = 31.048349393 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 = 31.048349393 + -2 Combine like terms: 2 + -2 = 0 0 + x = 31.048349393 + -2 x = 31.048349393 + -2 Combine like terms: 31.048349393 + -2 = 29.048349393 x = 29.048349393 Simplifying x = 29.048349393

Subproblem 2

x + 2 = -31.048349393 Simplifying x + 2 = -31.048349393 Reorder the terms: 2 + x = -31.048349393 Solving 2 + x = -31.048349393 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 = -31.048349393 + -2 Combine like terms: 2 + -2 = 0 0 + x = -31.048349393 + -2 x = -31.048349393 + -2 Combine like terms: -31.048349393 + -2 = -33.048349393 x = -33.048349393 Simplifying x = -33.048349393

Solution

The solution to the problem is based on the solutions from the subproblems. x = {29.048349393, -33.048349393}

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