x^2+8x=3850

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Solution for x^2+8x=3850 equation:


Simplifying
x2 + 8x = 3850

Reorder the terms:
8x + x2 = 3850

Solving
8x + x2 = 3850

Solving for variable 'x'.

Reorder the terms:
-3850 + 8x + x2 = 3850 + -3850

Combine like terms: 3850 + -3850 = 0
-3850 + 8x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '3850' to each side of the equation.
-3850 + 8x + 3850 + x2 = 0 + 3850

Reorder the terms:
-3850 + 3850 + 8x + x2 = 0 + 3850

Combine like terms: -3850 + 3850 = 0
0 + 8x + x2 = 0 + 3850
8x + x2 = 0 + 3850

Combine like terms: 0 + 3850 = 3850
8x + x2 = 3850

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 = 3850 + 16

Reorder the terms:
16 + 8x + x2 = 3850 + 16

Combine like terms: 3850 + 16 = 3866
16 + 8x + x2 = 3866

Factor a perfect square on the left side:
(x + 4)(x + 4) = 3866

Calculate the square root of the right side: 62.177166227

Break this problem into two subproblems by setting 
(x + 4) equal to 62.177166227 and -62.177166227.

Subproblem 1

x + 4 = 62.177166227 Simplifying x + 4 = 62.177166227 Reorder the terms: 4 + x = 62.177166227 Solving 4 + x = 62.177166227 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 = 62.177166227 + -4 Combine like terms: 4 + -4 = 0 0 + x = 62.177166227 + -4 x = 62.177166227 + -4 Combine like terms: 62.177166227 + -4 = 58.177166227 x = 58.177166227 Simplifying x = 58.177166227

Subproblem 2

x + 4 = -62.177166227 Simplifying x + 4 = -62.177166227 Reorder the terms: 4 + x = -62.177166227 Solving 4 + x = -62.177166227 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 = -62.177166227 + -4 Combine like terms: 4 + -4 = 0 0 + x = -62.177166227 + -4 x = -62.177166227 + -4 Combine like terms: -62.177166227 + -4 = -66.177166227 x = -66.177166227 Simplifying x = -66.177166227

Solution

The solution to the problem is based on the solutions from the subproblems. x = {58.177166227, -66.177166227}

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