.5x^2-.5x=741

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Solution for .5x^2-.5x=741 equation:


Simplifying
0.5x2 + -0.5x = 741

Reorder the terms:
-0.5x + 0.5x2 = 741

Solving
-0.5x + 0.5x2 = 741

Solving for variable 'x'.

Reorder the terms:
-741 + -0.5x + 0.5x2 = 741 + -741

Combine like terms: 741 + -741 = 0
-741 + -0.5x + 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'.
-1482 + -1x + x2 = 0

Move the constant term to the right:

Add '1482' to each side of the equation.
-1482 + -1x + 1482 + x2 = 0 + 1482

Reorder the terms:
-1482 + 1482 + -1x + x2 = 0 + 1482

Combine like terms: -1482 + 1482 = 0
0 + -1x + x2 = 0 + 1482
-1x + x2 = 0 + 1482

Combine like terms: 0 + 1482 = 1482
-1x + x2 = 1482

The x term is -1x.  Take half its coefficient (-0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
-1x + 0.25 + x2 = 1482 + 0.25

Reorder the terms:
0.25 + -1x + x2 = 1482 + 0.25

Combine like terms: 1482 + 0.25 = 1482.25
0.25 + -1x + x2 = 1482.25

Factor a perfect square on the left side:
(x + -0.5)(x + -0.5) = 1482.25

Calculate the square root of the right side: 38.5

Break this problem into two subproblems by setting 
(x + -0.5) equal to 38.5 and -38.5.

Subproblem 1

x + -0.5 = 38.5 Simplifying x + -0.5 = 38.5 Reorder the terms: -0.5 + x = 38.5 Solving -0.5 + x = 38.5 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x = 38.5 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = 38.5 + 0.5 x = 38.5 + 0.5 Combine like terms: 38.5 + 0.5 = 39 x = 39 Simplifying x = 39

Subproblem 2

x + -0.5 = -38.5 Simplifying x + -0.5 = -38.5 Reorder the terms: -0.5 + x = -38.5 Solving -0.5 + x = -38.5 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x = -38.5 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = -38.5 + 0.5 x = -38.5 + 0.5 Combine like terms: -38.5 + 0.5 = -38 x = -38 Simplifying x = -38

Solution

The solution to the problem is based on the solutions from the subproblems. x = {39, -38}

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