30x+x^2=54

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Solution for 30x+x^2=54 equation:


Simplifying
30x + x2 = 54

Solving
30x + x2 = 54

Solving for variable 'x'.

Reorder the terms:
-54 + 30x + x2 = 54 + -54

Combine like terms: 54 + -54 = 0
-54 + 30x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '54' to each side of the equation.
-54 + 30x + 54 + x2 = 0 + 54

Reorder the terms:
-54 + 54 + 30x + x2 = 0 + 54

Combine like terms: -54 + 54 = 0
0 + 30x + x2 = 0 + 54
30x + x2 = 0 + 54

Combine like terms: 0 + 54 = 54
30x + x2 = 54

The x term is 30x.  Take half its coefficient (15).
Square it (225) and add it to both sides.

Add '225' to each side of the equation.
30x + 225 + x2 = 54 + 225

Reorder the terms:
225 + 30x + x2 = 54 + 225

Combine like terms: 54 + 225 = 279
225 + 30x + x2 = 279

Factor a perfect square on the left side:
(x + 15)(x + 15) = 279

Calculate the square root of the right side: 16.703293088

Break this problem into two subproblems by setting 
(x + 15) equal to 16.703293088 and -16.703293088.

Subproblem 1

x + 15 = 16.703293088 Simplifying x + 15 = 16.703293088 Reorder the terms: 15 + x = 16.703293088 Solving 15 + x = 16.703293088 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-15' to each side of the equation. 15 + -15 + x = 16.703293088 + -15 Combine like terms: 15 + -15 = 0 0 + x = 16.703293088 + -15 x = 16.703293088 + -15 Combine like terms: 16.703293088 + -15 = 1.703293088 x = 1.703293088 Simplifying x = 1.703293088

Subproblem 2

x + 15 = -16.703293088 Simplifying x + 15 = -16.703293088 Reorder the terms: 15 + x = -16.703293088 Solving 15 + x = -16.703293088 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-15' to each side of the equation. 15 + -15 + x = -16.703293088 + -15 Combine like terms: 15 + -15 = 0 0 + x = -16.703293088 + -15 x = -16.703293088 + -15 Combine like terms: -16.703293088 + -15 = -31.703293088 x = -31.703293088 Simplifying x = -31.703293088

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.703293088, -31.703293088}

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