x^2+8x-2880=0

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Solution for x^2+8x-2880=0 equation:


Simplifying
x2 + 8x + -2880 = 0

Reorder the terms:
-2880 + 8x + x2 = 0

Solving
-2880 + 8x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '2880' to each side of the equation.
-2880 + 8x + 2880 + x2 = 0 + 2880

Reorder the terms:
-2880 + 2880 + 8x + x2 = 0 + 2880

Combine like terms: -2880 + 2880 = 0
0 + 8x + x2 = 0 + 2880
8x + x2 = 0 + 2880

Combine like terms: 0 + 2880 = 2880
8x + x2 = 2880

The x term is 8x.  Take half its coefficient (4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
8x + 16 + x2 = 2880 + 16

Reorder the terms:
16 + 8x + x2 = 2880 + 16

Combine like terms: 2880 + 16 = 2896
16 + 8x + x2 = 2896

Factor a perfect square on the left side:
(x + 4)(x + 4) = 2896

Calculate the square root of the right side: 53.814496188

Break this problem into two subproblems by setting 
(x + 4) equal to 53.814496188 and -53.814496188.

Subproblem 1

x + 4 = 53.814496188 Simplifying x + 4 = 53.814496188 Reorder the terms: 4 + x = 53.814496188 Solving 4 + x = 53.814496188 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + x = 53.814496188 + -4 Combine like terms: 4 + -4 = 0 0 + x = 53.814496188 + -4 x = 53.814496188 + -4 Combine like terms: 53.814496188 + -4 = 49.814496188 x = 49.814496188 Simplifying x = 49.814496188

Subproblem 2

x + 4 = -53.814496188 Simplifying x + 4 = -53.814496188 Reorder the terms: 4 + x = -53.814496188 Solving 4 + x = -53.814496188 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + x = -53.814496188 + -4 Combine like terms: 4 + -4 = 0 0 + x = -53.814496188 + -4 x = -53.814496188 + -4 Combine like terms: -53.814496188 + -4 = -57.814496188 x = -57.814496188 Simplifying x = -57.814496188

Solution

The solution to the problem is based on the solutions from the subproblems. x = {49.814496188, -57.814496188}

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