4.6x=54-x^2

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Solution for 4.6x=54-x^2 equation:


Simplifying
4.6x = 54 + -1x2

Solving
4.6x = 54 + -1x2

Solving for variable 'x'.

Reorder the terms:
-54 + 4.6x + x2 = 54 + -1x2 + -54 + x2

Reorder the terms:
-54 + 4.6x + x2 = 54 + -54 + -1x2 + x2

Combine like terms: 54 + -54 = 0
-54 + 4.6x + x2 = 0 + -1x2 + x2
-54 + 4.6x + x2 = -1x2 + x2

Combine like terms: -1x2 + x2 = 0
-54 + 4.6x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '54' to each side of the equation.
-54 + 4.6x + 54 + x2 = 0 + 54

Reorder the terms:
-54 + 54 + 4.6x + x2 = 0 + 54

Combine like terms: -54 + 54 = 0
0 + 4.6x + x2 = 0 + 54
4.6x + x2 = 0 + 54

Combine like terms: 0 + 54 = 54
4.6x + x2 = 54

The x term is 4.6x.  Take half its coefficient (2.3).
Square it (5.29) and add it to both sides.

Add '5.29' to each side of the equation.
4.6x + 5.29 + x2 = 54 + 5.29

Reorder the terms:
5.29 + 4.6x + x2 = 54 + 5.29

Combine like terms: 54 + 5.29 = 59.29
5.29 + 4.6x + x2 = 59.29

Factor a perfect square on the left side:
(x + 2.3)(x + 2.3) = 59.29

Calculate the square root of the right side: 7.7

Break this problem into two subproblems by setting 
(x + 2.3) equal to 7.7 and -7.7.

Subproblem 1

x + 2.3 = 7.7 Simplifying x + 2.3 = 7.7 Reorder the terms: 2.3 + x = 7.7 Solving 2.3 + x = 7.7 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.3' to each side of the equation. 2.3 + -2.3 + x = 7.7 + -2.3 Combine like terms: 2.3 + -2.3 = 0.0 0.0 + x = 7.7 + -2.3 x = 7.7 + -2.3 Combine like terms: 7.7 + -2.3 = 5.4 x = 5.4 Simplifying x = 5.4

Subproblem 2

x + 2.3 = -7.7 Simplifying x + 2.3 = -7.7 Reorder the terms: 2.3 + x = -7.7 Solving 2.3 + x = -7.7 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.3' to each side of the equation. 2.3 + -2.3 + x = -7.7 + -2.3 Combine like terms: 2.3 + -2.3 = 0.0 0.0 + x = -7.7 + -2.3 x = -7.7 + -2.3 Combine like terms: -7.7 + -2.3 = -10 x = -10 Simplifying x = -10

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.4, -10}

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