x^2+8x-460=0

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Solution for x^2+8x-460=0 equation:


Simplifying
x2 + 8x + -460 = 0

Reorder the terms:
-460 + 8x + x2 = 0

Solving
-460 + 8x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '460' to each side of the equation.
-460 + 8x + 460 + x2 = 0 + 460

Reorder the terms:
-460 + 460 + 8x + x2 = 0 + 460

Combine like terms: -460 + 460 = 0
0 + 8x + x2 = 0 + 460
8x + x2 = 0 + 460

Combine like terms: 0 + 460 = 460
8x + x2 = 460

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 = 460 + 16

Reorder the terms:
16 + 8x + x2 = 460 + 16

Combine like terms: 460 + 16 = 476
16 + 8x + x2 = 476

Factor a perfect square on the left side:
(x + 4)(x + 4) = 476

Calculate the square root of the right side: 21.817424229

Break this problem into two subproblems by setting 
(x + 4) equal to 21.817424229 and -21.817424229.

Subproblem 1

x + 4 = 21.817424229 Simplifying x + 4 = 21.817424229 Reorder the terms: 4 + x = 21.817424229 Solving 4 + x = 21.817424229 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 = 21.817424229 + -4 Combine like terms: 4 + -4 = 0 0 + x = 21.817424229 + -4 x = 21.817424229 + -4 Combine like terms: 21.817424229 + -4 = 17.817424229 x = 17.817424229 Simplifying x = 17.817424229

Subproblem 2

x + 4 = -21.817424229 Simplifying x + 4 = -21.817424229 Reorder the terms: 4 + x = -21.817424229 Solving 4 + x = -21.817424229 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 = -21.817424229 + -4 Combine like terms: 4 + -4 = 0 0 + x = -21.817424229 + -4 x = -21.817424229 + -4 Combine like terms: -21.817424229 + -4 = -25.817424229 x = -25.817424229 Simplifying x = -25.817424229

Solution

The solution to the problem is based on the solutions from the subproblems. x = {17.817424229, -25.817424229}

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