x^2+24x-84=29

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Solution for x^2+24x-84=29 equation:


Simplifying
x2 + 24x + -84 = 29

Reorder the terms:
-84 + 24x + x2 = 29

Solving
-84 + 24x + x2 = 29

Solving for variable 'x'.

Reorder the terms:
-84 + -29 + 24x + x2 = 29 + -29

Combine like terms: -84 + -29 = -113
-113 + 24x + x2 = 29 + -29

Combine like terms: 29 + -29 = 0
-113 + 24x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '113' to each side of the equation.
-113 + 24x + 113 + x2 = 0 + 113

Reorder the terms:
-113 + 113 + 24x + x2 = 0 + 113

Combine like terms: -113 + 113 = 0
0 + 24x + x2 = 0 + 113
24x + x2 = 0 + 113

Combine like terms: 0 + 113 = 113
24x + x2 = 113

The x term is 24x.  Take half its coefficient (12).
Square it (144) and add it to both sides.

Add '144' to each side of the equation.
24x + 144 + x2 = 113 + 144

Reorder the terms:
144 + 24x + x2 = 113 + 144

Combine like terms: 113 + 144 = 257
144 + 24x + x2 = 257

Factor a perfect square on the left side:
(x + 12)(x + 12) = 257

Calculate the square root of the right side: 16.031219542

Break this problem into two subproblems by setting 
(x + 12) equal to 16.031219542 and -16.031219542.

Subproblem 1

x + 12 = 16.031219542 Simplifying x + 12 = 16.031219542 Reorder the terms: 12 + x = 16.031219542 Solving 12 + x = 16.031219542 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-12' to each side of the equation. 12 + -12 + x = 16.031219542 + -12 Combine like terms: 12 + -12 = 0 0 + x = 16.031219542 + -12 x = 16.031219542 + -12 Combine like terms: 16.031219542 + -12 = 4.031219542 x = 4.031219542 Simplifying x = 4.031219542

Subproblem 2

x + 12 = -16.031219542 Simplifying x + 12 = -16.031219542 Reorder the terms: 12 + x = -16.031219542 Solving 12 + x = -16.031219542 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-12' to each side of the equation. 12 + -12 + x = -16.031219542 + -12 Combine like terms: 12 + -12 = 0 0 + x = -16.031219542 + -12 x = -16.031219542 + -12 Combine like terms: -16.031219542 + -12 = -28.031219542 x = -28.031219542 Simplifying x = -28.031219542

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.031219542, -28.031219542}

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