x^2+3x-54=33

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Solution for x^2+3x-54=33 equation:


Simplifying
x2 + 3x + -54 = 33

Reorder the terms:
-54 + 3x + x2 = 33

Solving
-54 + 3x + x2 = 33

Solving for variable 'x'.

Reorder the terms:
-54 + -33 + 3x + x2 = 33 + -33

Combine like terms: -54 + -33 = -87
-87 + 3x + x2 = 33 + -33

Combine like terms: 33 + -33 = 0
-87 + 3x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '87' to each side of the equation.
-87 + 3x + 87 + x2 = 0 + 87

Reorder the terms:
-87 + 87 + 3x + x2 = 0 + 87

Combine like terms: -87 + 87 = 0
0 + 3x + x2 = 0 + 87
3x + x2 = 0 + 87

Combine like terms: 0 + 87 = 87
3x + x2 = 87

The x term is 3x.  Take half its coefficient (1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
3x + 2.25 + x2 = 87 + 2.25

Reorder the terms:
2.25 + 3x + x2 = 87 + 2.25

Combine like terms: 87 + 2.25 = 89.25
2.25 + 3x + x2 = 89.25

Factor a perfect square on the left side:
(x + 1.5)(x + 1.5) = 89.25

Calculate the square root of the right side: 9.447221814

Break this problem into two subproblems by setting 
(x + 1.5) equal to 9.447221814 and -9.447221814.

Subproblem 1

x + 1.5 = 9.447221814 Simplifying x + 1.5 = 9.447221814 Reorder the terms: 1.5 + x = 9.447221814 Solving 1.5 + x = 9.447221814 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + x = 9.447221814 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = 9.447221814 + -1.5 x = 9.447221814 + -1.5 Combine like terms: 9.447221814 + -1.5 = 7.947221814 x = 7.947221814 Simplifying x = 7.947221814

Subproblem 2

x + 1.5 = -9.447221814 Simplifying x + 1.5 = -9.447221814 Reorder the terms: 1.5 + x = -9.447221814 Solving 1.5 + x = -9.447221814 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + x = -9.447221814 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = -9.447221814 + -1.5 x = -9.447221814 + -1.5 Combine like terms: -9.447221814 + -1.5 = -10.947221814 x = -10.947221814 Simplifying x = -10.947221814

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.947221814, -10.947221814}

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