x^2+5x-520=

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Solution for x^2+5x-520= equation:


Simplifying
x2 + 5x + -520 = 0

Reorder the terms:
-520 + 5x + x2 = 0

Solving
-520 + 5x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '520' to each side of the equation.
-520 + 5x + 520 + x2 = 0 + 520

Reorder the terms:
-520 + 520 + 5x + x2 = 0 + 520

Combine like terms: -520 + 520 = 0
0 + 5x + x2 = 0 + 520
5x + x2 = 0 + 520

Combine like terms: 0 + 520 = 520
5x + x2 = 520

The x term is 5x.  Take half its coefficient (2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
5x + 6.25 + x2 = 520 + 6.25

Reorder the terms:
6.25 + 5x + x2 = 520 + 6.25

Combine like terms: 520 + 6.25 = 526.25
6.25 + 5x + x2 = 526.25

Factor a perfect square on the left side:
(x + 2.5)(x + 2.5) = 526.25

Calculate the square root of the right side: 22.940139494

Break this problem into two subproblems by setting 
(x + 2.5) equal to 22.940139494 and -22.940139494.

Subproblem 1

x + 2.5 = 22.940139494 Simplifying x + 2.5 = 22.940139494 Reorder the terms: 2.5 + x = 22.940139494 Solving 2.5 + x = 22.940139494 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + x = 22.940139494 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = 22.940139494 + -2.5 x = 22.940139494 + -2.5 Combine like terms: 22.940139494 + -2.5 = 20.440139494 x = 20.440139494 Simplifying x = 20.440139494

Subproblem 2

x + 2.5 = -22.940139494 Simplifying x + 2.5 = -22.940139494 Reorder the terms: 2.5 + x = -22.940139494 Solving 2.5 + x = -22.940139494 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + x = -22.940139494 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = -22.940139494 + -2.5 x = -22.940139494 + -2.5 Combine like terms: -22.940139494 + -2.5 = -25.440139494 x = -25.440139494 Simplifying x = -25.440139494

Solution

The solution to the problem is based on the solutions from the subproblems. x = {20.440139494, -25.440139494}

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