.5x^2-1.5x=1275

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Solution for .5x^2-1.5x=1275 equation:


Simplifying
0.5x2 + -1.5x = 1275

Reorder the terms:
-1.5x + 0.5x2 = 1275

Solving
-1.5x + 0.5x2 = 1275

Solving for variable 'x'.

Reorder the terms:
-1275 + -1.5x + 0.5x2 = 1275 + -1275

Combine like terms: 1275 + -1275 = 0
-1275 + -1.5x + 0.5x2 = 0

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

Divide each side by '0.5'.
-2550 + -3x + x2 = 0

Move the constant term to the right:

Add '2550' to each side of the equation.
-2550 + -3x + 2550 + x2 = 0 + 2550

Reorder the terms:
-2550 + 2550 + -3x + x2 = 0 + 2550

Combine like terms: -2550 + 2550 = 0
0 + -3x + x2 = 0 + 2550
-3x + x2 = 0 + 2550

Combine like terms: 0 + 2550 = 2550
-3x + x2 = 2550

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 = 2550 + 2.25

Reorder the terms:
2.25 + -3x + x2 = 2550 + 2.25

Combine like terms: 2550 + 2.25 = 2552.25
2.25 + -3x + x2 = 2552.25

Factor a perfect square on the left side:
(x + -1.5)(x + -1.5) = 2552.25

Calculate the square root of the right side: 50.519798099

Break this problem into two subproblems by setting 
(x + -1.5) equal to 50.519798099 and -50.519798099.

Subproblem 1

x + -1.5 = 50.519798099 Simplifying x + -1.5 = 50.519798099 Reorder the terms: -1.5 + x = 50.519798099 Solving -1.5 + x = 50.519798099 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 = 50.519798099 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = 50.519798099 + 1.5 x = 50.519798099 + 1.5 Combine like terms: 50.519798099 + 1.5 = 52.019798099 x = 52.019798099 Simplifying x = 52.019798099

Subproblem 2

x + -1.5 = -50.519798099 Simplifying x + -1.5 = -50.519798099 Reorder the terms: -1.5 + x = -50.519798099 Solving -1.5 + x = -50.519798099 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 = -50.519798099 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = -50.519798099 + 1.5 x = -50.519798099 + 1.5 Combine like terms: -50.519798099 + 1.5 = -49.019798099 x = -49.019798099 Simplifying x = -49.019798099

Solution

The solution to the problem is based on the solutions from the subproblems. x = {52.019798099, -49.019798099}

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