-0.5x^2=-17x-17.5

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Solution for -0.5x^2=-17x-17.5 equation:


Simplifying
-0.5x2 = -17x + -17.5

Reorder the terms:
-0.5x2 = -17.5 + -17x

Solving
-0.5x2 = -17.5 + -17x

Solving for variable 'x'.

Reorder the terms:
17.5 + 17x + -0.5x2 = -17.5 + -17x + 17.5 + 17x

Reorder the terms:
17.5 + 17x + -0.5x2 = -17.5 + 17.5 + -17x + 17x

Combine like terms: -17.5 + 17.5 = 0.0
17.5 + 17x + -0.5x2 = 0.0 + -17x + 17x
17.5 + 17x + -0.5x2 = -17x + 17x

Combine like terms: -17x + 17x = 0
17.5 + 17x + -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'.
-35 + -34x + x2 = 0

Move the constant term to the right:

Add '35' to each side of the equation.
-35 + -34x + 35 + x2 = 0 + 35

Reorder the terms:
-35 + 35 + -34x + x2 = 0 + 35

Combine like terms: -35 + 35 = 0
0 + -34x + x2 = 0 + 35
-34x + x2 = 0 + 35

Combine like terms: 0 + 35 = 35
-34x + x2 = 35

The x term is -34x.  Take half its coefficient (-17).
Square it (289) and add it to both sides.

Add '289' to each side of the equation.
-34x + 289 + x2 = 35 + 289

Reorder the terms:
289 + -34x + x2 = 35 + 289

Combine like terms: 35 + 289 = 324
289 + -34x + x2 = 324

Factor a perfect square on the left side:
(x + -17)(x + -17) = 324

Calculate the square root of the right side: 18

Break this problem into two subproblems by setting 
(x + -17) equal to 18 and -18.

Subproblem 1

x + -17 = 18 Simplifying x + -17 = 18 Reorder the terms: -17 + x = 18 Solving -17 + x = 18 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '17' to each side of the equation. -17 + 17 + x = 18 + 17 Combine like terms: -17 + 17 = 0 0 + x = 18 + 17 x = 18 + 17 Combine like terms: 18 + 17 = 35 x = 35 Simplifying x = 35

Subproblem 2

x + -17 = -18 Simplifying x + -17 = -18 Reorder the terms: -17 + x = -18 Solving -17 + x = -18 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '17' to each side of the equation. -17 + 17 + x = -18 + 17 Combine like terms: -17 + 17 = 0 0 + x = -18 + 17 x = -18 + 17 Combine like terms: -18 + 17 = -1 x = -1 Simplifying x = -1

Solution

The solution to the problem is based on the solutions from the subproblems. x = {35, -1}

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