417=.5x^2+36x-105

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Solution for 417=.5x^2+36x-105 equation:


Simplifying
417 = 0.5x2 + 36x + -105

Reorder the terms:
417 = -105 + 36x + 0.5x2

Solving
417 = -105 + 36x + 0.5x2

Solving for variable 'x'.

Combine like terms: 417 + 105 = 522
522 + -36x + -0.5x2 = -105 + 36x + 0.5x2 + 105 + -36x + -0.5x2

Reorder the terms:
522 + -36x + -0.5x2 = -105 + 105 + 36x + -36x + 0.5x2 + -0.5x2

Combine like terms: -105 + 105 = 0
522 + -36x + -0.5x2 = 0 + 36x + -36x + 0.5x2 + -0.5x2
522 + -36x + -0.5x2 = 36x + -36x + 0.5x2 + -0.5x2

Combine like terms: 36x + -36x = 0
522 + -36x + -0.5x2 = 0 + 0.5x2 + -0.5x2
522 + -36x + -0.5x2 = 0.5x2 + -0.5x2

Combine like terms: 0.5x2 + -0.5x2 = 0.0
522 + -36x + -0.5x2 = 0.0

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

Divide each side by '-0.5'.
-1044 + 72x + x2 = 0

Move the constant term to the right:

Add '1044' to each side of the equation.
-1044 + 72x + 1044 + x2 = 0 + 1044

Reorder the terms:
-1044 + 1044 + 72x + x2 = 0 + 1044

Combine like terms: -1044 + 1044 = 0
0 + 72x + x2 = 0 + 1044
72x + x2 = 0 + 1044

Combine like terms: 0 + 1044 = 1044
72x + x2 = 1044

The x term is 72x.  Take half its coefficient (36).
Square it (1296) and add it to both sides.

Add '1296' to each side of the equation.
72x + 1296 + x2 = 1044 + 1296

Reorder the terms:
1296 + 72x + x2 = 1044 + 1296

Combine like terms: 1044 + 1296 = 2340
1296 + 72x + x2 = 2340

Factor a perfect square on the left side:
(x + 36)(x + 36) = 2340

Calculate the square root of the right side: 48.37354649

Break this problem into two subproblems by setting 
(x + 36) equal to 48.37354649 and -48.37354649.

Subproblem 1

x + 36 = 48.37354649 Simplifying x + 36 = 48.37354649 Reorder the terms: 36 + x = 48.37354649 Solving 36 + x = 48.37354649 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-36' to each side of the equation. 36 + -36 + x = 48.37354649 + -36 Combine like terms: 36 + -36 = 0 0 + x = 48.37354649 + -36 x = 48.37354649 + -36 Combine like terms: 48.37354649 + -36 = 12.37354649 x = 12.37354649 Simplifying x = 12.37354649

Subproblem 2

x + 36 = -48.37354649 Simplifying x + 36 = -48.37354649 Reorder the terms: 36 + x = -48.37354649 Solving 36 + x = -48.37354649 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-36' to each side of the equation. 36 + -36 + x = -48.37354649 + -36 Combine like terms: 36 + -36 = 0 0 + x = -48.37354649 + -36 x = -48.37354649 + -36 Combine like terms: -48.37354649 + -36 = -84.37354649 x = -84.37354649 Simplifying x = -84.37354649

Solution

The solution to the problem is based on the solutions from the subproblems. x = {12.37354649, -84.37354649}

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