x(x)=2x^2+33x-54

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Solution for x(x)=2x^2+33x-54 equation:


Simplifying
x(x) = 2x2 + 33x + -54

Multiply x * x
x2 = 2x2 + 33x + -54

Reorder the terms:
x2 = -54 + 33x + 2x2

Solving
x2 = -54 + 33x + 2x2

Solving for variable 'x'.

Reorder the terms:
54 + -33x + x2 + -2x2 = -54 + 33x + 2x2 + 54 + -33x + -2x2

Combine like terms: x2 + -2x2 = -1x2
54 + -33x + -1x2 = -54 + 33x + 2x2 + 54 + -33x + -2x2

Reorder the terms:
54 + -33x + -1x2 = -54 + 54 + 33x + -33x + 2x2 + -2x2

Combine like terms: -54 + 54 = 0
54 + -33x + -1x2 = 0 + 33x + -33x + 2x2 + -2x2
54 + -33x + -1x2 = 33x + -33x + 2x2 + -2x2

Combine like terms: 33x + -33x = 0
54 + -33x + -1x2 = 0 + 2x2 + -2x2
54 + -33x + -1x2 = 2x2 + -2x2

Combine like terms: 2x2 + -2x2 = 0
54 + -33x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-54 + 33x + x2 = 0

Move the constant term to the right:

Add '54' to each side of the equation.
-54 + 33x + 54 + x2 = 0 + 54

Reorder the terms:
-54 + 54 + 33x + x2 = 0 + 54

Combine like terms: -54 + 54 = 0
0 + 33x + x2 = 0 + 54
33x + x2 = 0 + 54

Combine like terms: 0 + 54 = 54
33x + x2 = 54

The x term is 33x.  Take half its coefficient (16.5).
Square it (272.25) and add it to both sides.

Add '272.25' to each side of the equation.
33x + 272.25 + x2 = 54 + 272.25

Reorder the terms:
272.25 + 33x + x2 = 54 + 272.25

Combine like terms: 54 + 272.25 = 326.25
272.25 + 33x + x2 = 326.25

Factor a perfect square on the left side:
(x + 16.5)(x + 16.5) = 326.25

Calculate the square root of the right side: 18.062391868

Break this problem into two subproblems by setting 
(x + 16.5) equal to 18.062391868 and -18.062391868.

Subproblem 1

x + 16.5 = 18.062391868 Simplifying x + 16.5 = 18.062391868 Reorder the terms: 16.5 + x = 18.062391868 Solving 16.5 + x = 18.062391868 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-16.5' to each side of the equation. 16.5 + -16.5 + x = 18.062391868 + -16.5 Combine like terms: 16.5 + -16.5 = 0.0 0.0 + x = 18.062391868 + -16.5 x = 18.062391868 + -16.5 Combine like terms: 18.062391868 + -16.5 = 1.562391868 x = 1.562391868 Simplifying x = 1.562391868

Subproblem 2

x + 16.5 = -18.062391868 Simplifying x + 16.5 = -18.062391868 Reorder the terms: 16.5 + x = -18.062391868 Solving 16.5 + x = -18.062391868 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-16.5' to each side of the equation. 16.5 + -16.5 + x = -18.062391868 + -16.5 Combine like terms: 16.5 + -16.5 = 0.0 0.0 + x = -18.062391868 + -16.5 x = -18.062391868 + -16.5 Combine like terms: -18.062391868 + -16.5 = -34.562391868 x = -34.562391868 Simplifying x = -34.562391868

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.562391868, -34.562391868}

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