x^2=10.8-54x

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Solution for x^2=10.8-54x equation:


Simplifying
x2 = 10.8 + -54x

Solving
x2 = 10.8 + -54x

Solving for variable 'x'.

Reorder the terms:
-10.8 + 54x + x2 = 10.8 + -54x + -10.8 + 54x

Reorder the terms:
-10.8 + 54x + x2 = 10.8 + -10.8 + -54x + 54x

Combine like terms: 10.8 + -10.8 = 0.0
-10.8 + 54x + x2 = 0.0 + -54x + 54x
-10.8 + 54x + x2 = -54x + 54x

Combine like terms: -54x + 54x = 0
-10.8 + 54x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '10.8' to each side of the equation.
-10.8 + 54x + 10.8 + x2 = 0 + 10.8

Reorder the terms:
-10.8 + 10.8 + 54x + x2 = 0 + 10.8

Combine like terms: -10.8 + 10.8 = 0.0
0.0 + 54x + x2 = 0 + 10.8
54x + x2 = 0 + 10.8

Combine like terms: 0 + 10.8 = 10.8
54x + x2 = 10.8

The x term is 54x.  Take half its coefficient (27).
Square it (729) and add it to both sides.

Add '729' to each side of the equation.
54x + 729 + x2 = 10.8 + 729

Reorder the terms:
729 + 54x + x2 = 10.8 + 729

Combine like terms: 10.8 + 729 = 739.8
729 + 54x + x2 = 739.8

Factor a perfect square on the left side:
(x + 27)(x + 27) = 739.8

Calculate the square root of the right side: 27.199264696

Break this problem into two subproblems by setting 
(x + 27) equal to 27.199264696 and -27.199264696.

Subproblem 1

x + 27 = 27.199264696 Simplifying x + 27 = 27.199264696 Reorder the terms: 27 + x = 27.199264696 Solving 27 + x = 27.199264696 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-27' to each side of the equation. 27 + -27 + x = 27.199264696 + -27 Combine like terms: 27 + -27 = 0 0 + x = 27.199264696 + -27 x = 27.199264696 + -27 Combine like terms: 27.199264696 + -27 = 0.199264696 x = 0.199264696 Simplifying x = 0.199264696

Subproblem 2

x + 27 = -27.199264696 Simplifying x + 27 = -27.199264696 Reorder the terms: 27 + x = -27.199264696 Solving 27 + x = -27.199264696 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-27' to each side of the equation. 27 + -27 + x = -27.199264696 + -27 Combine like terms: 27 + -27 = 0 0 + x = -27.199264696 + -27 x = -27.199264696 + -27 Combine like terms: -27.199264696 + -27 = -54.199264696 x = -54.199264696 Simplifying x = -54.199264696

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.199264696, -54.199264696}

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