x(x+1)=323

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Solution for x(x+1)=323 equation:


Simplifying
x(x + 1) = 323

Reorder the terms:
x(1 + x) = 323
(1 * x + x * x) = 323
(1x + x2) = 323

Solving
1x + x2 = 323

Solving for variable 'x'.

Reorder the terms:
-323 + 1x + x2 = 323 + -323

Combine like terms: 323 + -323 = 0
-323 + 1x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '323' to each side of the equation.
-323 + 1x + 323 + x2 = 0 + 323

Reorder the terms:
-323 + 323 + 1x + x2 = 0 + 323

Combine like terms: -323 + 323 = 0
0 + 1x + x2 = 0 + 323
1x + x2 = 0 + 323

Combine like terms: 0 + 323 = 323
1x + x2 = 323

The x term is 1x.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
x + 0.25 + x2 = 323 + 0.25

Reorder the terms:
0.25 + x + x2 = 323 + 0.25

Combine like terms: 323 + 0.25 = 323.25
0.25 + x + x2 = 323.25

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 323.25

Calculate the square root of the right side: 17.979154596

Break this problem into two subproblems by setting 
(x + 0.5) equal to 17.979154596 and -17.979154596.

Subproblem 1

x + 0.5 = 17.979154596 Simplifying x + 0.5 = 17.979154596 Reorder the terms: 0.5 + x = 17.979154596 Solving 0.5 + x = 17.979154596 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 17.979154596 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 17.979154596 + -0.5 x = 17.979154596 + -0.5 Combine like terms: 17.979154596 + -0.5 = 17.479154596 x = 17.479154596 Simplifying x = 17.479154596

Subproblem 2

x + 0.5 = -17.979154596 Simplifying x + 0.5 = -17.979154596 Reorder the terms: 0.5 + x = -17.979154596 Solving 0.5 + x = -17.979154596 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -17.979154596 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -17.979154596 + -0.5 x = -17.979154596 + -0.5 Combine like terms: -17.979154596 + -0.5 = -18.479154596 x = -18.479154596 Simplifying x = -18.479154596

Solution

The solution to the problem is based on the solutions from the subproblems. x = {17.479154596, -18.479154596}

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