x^2+9+8x+1=322

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Solution for x^2+9+8x+1=322 equation:


Simplifying
x2 + 9 + 8x + 1 = 322

Reorder the terms:
9 + 1 + 8x + x2 = 322

Combine like terms: 9 + 1 = 10
10 + 8x + x2 = 322

Solving
10 + 8x + x2 = 322

Solving for variable 'x'.

Reorder the terms:
10 + -322 + 8x + x2 = 322 + -322

Combine like terms: 10 + -322 = -312
-312 + 8x + x2 = 322 + -322

Combine like terms: 322 + -322 = 0
-312 + 8x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '312' to each side of the equation.
-312 + 8x + 312 + x2 = 0 + 312

Reorder the terms:
-312 + 312 + 8x + x2 = 0 + 312

Combine like terms: -312 + 312 = 0
0 + 8x + x2 = 0 + 312
8x + x2 = 0 + 312

Combine like terms: 0 + 312 = 312
8x + x2 = 312

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 = 312 + 16

Reorder the terms:
16 + 8x + x2 = 312 + 16

Combine like terms: 312 + 16 = 328
16 + 8x + x2 = 328

Factor a perfect square on the left side:
(x + 4)(x + 4) = 328

Calculate the square root of the right side: 18.110770276

Break this problem into two subproblems by setting 
(x + 4) equal to 18.110770276 and -18.110770276.

Subproblem 1

x + 4 = 18.110770276 Simplifying x + 4 = 18.110770276 Reorder the terms: 4 + x = 18.110770276 Solving 4 + x = 18.110770276 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 = 18.110770276 + -4 Combine like terms: 4 + -4 = 0 0 + x = 18.110770276 + -4 x = 18.110770276 + -4 Combine like terms: 18.110770276 + -4 = 14.110770276 x = 14.110770276 Simplifying x = 14.110770276

Subproblem 2

x + 4 = -18.110770276 Simplifying x + 4 = -18.110770276 Reorder the terms: 4 + x = -18.110770276 Solving 4 + x = -18.110770276 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 = -18.110770276 + -4 Combine like terms: 4 + -4 = 0 0 + x = -18.110770276 + -4 x = -18.110770276 + -4 Combine like terms: -18.110770276 + -4 = -22.110770276 x = -22.110770276 Simplifying x = -22.110770276

Solution

The solution to the problem is based on the solutions from the subproblems. x = {14.110770276, -22.110770276}

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