0=x^2+4x-560

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Solution for 0=x^2+4x-560 equation:


Simplifying
0 = x2 + 4x + -560

Reorder the terms:
0 = -560 + 4x + x2

Solving
0 = -560 + 4x + x2

Solving for variable 'x'.

Combine like terms: 0 + 560 = 560
560 + -4x + -1x2 = -560 + 4x + x2 + 560 + -4x + -1x2

Reorder the terms:
560 + -4x + -1x2 = -560 + 560 + 4x + -4x + x2 + -1x2

Combine like terms: -560 + 560 = 0
560 + -4x + -1x2 = 0 + 4x + -4x + x2 + -1x2
560 + -4x + -1x2 = 4x + -4x + x2 + -1x2

Combine like terms: 4x + -4x = 0
560 + -4x + -1x2 = 0 + x2 + -1x2
560 + -4x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
560 + -4x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-560 + 4x + x2 = 0

Move the constant term to the right:

Add '560' to each side of the equation.
-560 + 4x + 560 + x2 = 0 + 560

Reorder the terms:
-560 + 560 + 4x + x2 = 0 + 560

Combine like terms: -560 + 560 = 0
0 + 4x + x2 = 0 + 560
4x + x2 = 0 + 560

Combine like terms: 0 + 560 = 560
4x + x2 = 560

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 = 560 + 4

Reorder the terms:
4 + 4x + x2 = 560 + 4

Combine like terms: 560 + 4 = 564
4 + 4x + x2 = 564

Factor a perfect square on the left side:
(x + 2)(x + 2) = 564

Calculate the square root of the right side: 23.748684174

Break this problem into two subproblems by setting 
(x + 2) equal to 23.748684174 and -23.748684174.

Subproblem 1

x + 2 = 23.748684174 Simplifying x + 2 = 23.748684174 Reorder the terms: 2 + x = 23.748684174 Solving 2 + x = 23.748684174 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 = 23.748684174 + -2 Combine like terms: 2 + -2 = 0 0 + x = 23.748684174 + -2 x = 23.748684174 + -2 Combine like terms: 23.748684174 + -2 = 21.748684174 x = 21.748684174 Simplifying x = 21.748684174

Subproblem 2

x + 2 = -23.748684174 Simplifying x + 2 = -23.748684174 Reorder the terms: 2 + x = -23.748684174 Solving 2 + x = -23.748684174 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 = -23.748684174 + -2 Combine like terms: 2 + -2 = 0 0 + x = -23.748684174 + -2 x = -23.748684174 + -2 Combine like terms: -23.748684174 + -2 = -25.748684174 x = -25.748684174 Simplifying x = -25.748684174

Solution

The solution to the problem is based on the solutions from the subproblems. x = {21.748684174, -25.748684174}

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