43.5=x^2-3x

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Solution for 43.5=x^2-3x equation:


Simplifying
43.5 = x2 + -3x

Reorder the terms:
43.5 = -3x + x2

Solving
43.5 = -3x + x2

Solving for variable 'x'.

Reorder the terms:
43.5 + 3x + -1x2 = -3x + 3x + x2 + -1x2

Combine like terms: -3x + 3x = 0
43.5 + 3x + -1x2 = 0 + x2 + -1x2
43.5 + 3x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
43.5 + 3x + -1x2 = 0

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

Divide each side by '-1'.
-43.5 + -3x + x2 = 0

Move the constant term to the right:

Add '43.5' to each side of the equation.
-43.5 + -3x + 43.5 + x2 = 0 + 43.5

Reorder the terms:
-43.5 + 43.5 + -3x + x2 = 0 + 43.5

Combine like terms: -43.5 + 43.5 = 0.0
0.0 + -3x + x2 = 0 + 43.5
-3x + x2 = 0 + 43.5

Combine like terms: 0 + 43.5 = 43.5
-3x + x2 = 43.5

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 = 43.5 + 2.25

Reorder the terms:
2.25 + -3x + x2 = 43.5 + 2.25

Combine like terms: 43.5 + 2.25 = 45.75
2.25 + -3x + x2 = 45.75

Factor a perfect square on the left side:
(x + -1.5)(x + -1.5) = 45.75

Calculate the square root of the right side: 6.763874629

Break this problem into two subproblems by setting 
(x + -1.5) equal to 6.763874629 and -6.763874629.

Subproblem 1

x + -1.5 = 6.763874629 Simplifying x + -1.5 = 6.763874629 Reorder the terms: -1.5 + x = 6.763874629 Solving -1.5 + x = 6.763874629 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 = 6.763874629 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = 6.763874629 + 1.5 x = 6.763874629 + 1.5 Combine like terms: 6.763874629 + 1.5 = 8.263874629 x = 8.263874629 Simplifying x = 8.263874629

Subproblem 2

x + -1.5 = -6.763874629 Simplifying x + -1.5 = -6.763874629 Reorder the terms: -1.5 + x = -6.763874629 Solving -1.5 + x = -6.763874629 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 = -6.763874629 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = -6.763874629 + 1.5 x = -6.763874629 + 1.5 Combine like terms: -6.763874629 + 1.5 = -5.263874629 x = -5.263874629 Simplifying x = -5.263874629

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.263874629, -5.263874629}

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