x^2+10.8x-1296=0

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Solution for x^2+10.8x-1296=0 equation:


Simplifying
x2 + 10.8x + -1296 = 0

Reorder the terms:
-1296 + 10.8x + x2 = 0

Solving
-1296 + 10.8x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '1296' to each side of the equation.
-1296 + 10.8x + 1296 + x2 = 0 + 1296

Reorder the terms:
-1296 + 1296 + 10.8x + x2 = 0 + 1296

Combine like terms: -1296 + 1296 = 0
0 + 10.8x + x2 = 0 + 1296
10.8x + x2 = 0 + 1296

Combine like terms: 0 + 1296 = 1296
10.8x + x2 = 1296

The x term is 10.8x.  Take half its coefficient (5.4).
Square it (29.16) and add it to both sides.

Add '29.16' to each side of the equation.
10.8x + 29.16 + x2 = 1296 + 29.16

Reorder the terms:
29.16 + 10.8x + x2 = 1296 + 29.16

Combine like terms: 1296 + 29.16 = 1325.16
29.16 + 10.8x + x2 = 1325.16

Factor a perfect square on the left side:
(x + 5.4)(x + 5.4) = 1325.16

Calculate the square root of the right side: 36.402747149

Break this problem into two subproblems by setting 
(x + 5.4) equal to 36.402747149 and -36.402747149.

Subproblem 1

x + 5.4 = 36.402747149 Simplifying x + 5.4 = 36.402747149 Reorder the terms: 5.4 + x = 36.402747149 Solving 5.4 + x = 36.402747149 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5.4' to each side of the equation. 5.4 + -5.4 + x = 36.402747149 + -5.4 Combine like terms: 5.4 + -5.4 = 0.0 0.0 + x = 36.402747149 + -5.4 x = 36.402747149 + -5.4 Combine like terms: 36.402747149 + -5.4 = 31.002747149 x = 31.002747149 Simplifying x = 31.002747149

Subproblem 2

x + 5.4 = -36.402747149 Simplifying x + 5.4 = -36.402747149 Reorder the terms: 5.4 + x = -36.402747149 Solving 5.4 + x = -36.402747149 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5.4' to each side of the equation. 5.4 + -5.4 + x = -36.402747149 + -5.4 Combine like terms: 5.4 + -5.4 = 0.0 0.0 + x = -36.402747149 + -5.4 x = -36.402747149 + -5.4 Combine like terms: -36.402747149 + -5.4 = -41.802747149 x = -41.802747149 Simplifying x = -41.802747149

Solution

The solution to the problem is based on the solutions from the subproblems. x = {31.002747149, -41.802747149}

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