=180+15x-70x-x^2

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Solution for =180+15x-70x-x^2 equation:


Simplifying
0 = 180 + 15x + -70x + -1x2

Combine like terms: 15x + -70x = -55x
0 = 180 + -55x + -1x2

Solving
0 = 180 + -55x + -1x2

Solving for variable 'x'.

Combine like terms: 0 + -180 = -180
-180 + 55x + x2 = 180 + -55x + -1x2 + -180 + 55x + x2

Reorder the terms:
-180 + 55x + x2 = 180 + -180 + -55x + 55x + -1x2 + x2

Combine like terms: 180 + -180 = 0
-180 + 55x + x2 = 0 + -55x + 55x + -1x2 + x2
-180 + 55x + x2 = -55x + 55x + -1x2 + x2

Combine like terms: -55x + 55x = 0
-180 + 55x + x2 = 0 + -1x2 + x2
-180 + 55x + x2 = -1x2 + x2

Combine like terms: -1x2 + x2 = 0
-180 + 55x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '180' to each side of the equation.
-180 + 55x + 180 + x2 = 0 + 180

Reorder the terms:
-180 + 180 + 55x + x2 = 0 + 180

Combine like terms: -180 + 180 = 0
0 + 55x + x2 = 0 + 180
55x + x2 = 0 + 180

Combine like terms: 0 + 180 = 180
55x + x2 = 180

The x term is 55x.  Take half its coefficient (27.5).
Square it (756.25) and add it to both sides.

Add '756.25' to each side of the equation.
55x + 756.25 + x2 = 180 + 756.25

Reorder the terms:
756.25 + 55x + x2 = 180 + 756.25

Combine like terms: 180 + 756.25 = 936.25
756.25 + 55x + x2 = 936.25

Factor a perfect square on the left side:
(x + 27.5)(x + 27.5) = 936.25

Calculate the square root of the right side: 30.598202562

Break this problem into two subproblems by setting 
(x + 27.5) equal to 30.598202562 and -30.598202562.

Subproblem 1

x + 27.5 = 30.598202562 Simplifying x + 27.5 = 30.598202562 Reorder the terms: 27.5 + x = 30.598202562 Solving 27.5 + x = 30.598202562 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-27.5' to each side of the equation. 27.5 + -27.5 + x = 30.598202562 + -27.5 Combine like terms: 27.5 + -27.5 = 0.0 0.0 + x = 30.598202562 + -27.5 x = 30.598202562 + -27.5 Combine like terms: 30.598202562 + -27.5 = 3.098202562 x = 3.098202562 Simplifying x = 3.098202562

Subproblem 2

x + 27.5 = -30.598202562 Simplifying x + 27.5 = -30.598202562 Reorder the terms: 27.5 + x = -30.598202562 Solving 27.5 + x = -30.598202562 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-27.5' to each side of the equation. 27.5 + -27.5 + x = -30.598202562 + -27.5 Combine like terms: 27.5 + -27.5 = 0.0 0.0 + x = -30.598202562 + -27.5 x = -30.598202562 + -27.5 Combine like terms: -30.598202562 + -27.5 = -58.098202562 x = -58.098202562 Simplifying x = -58.098202562

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.098202562, -58.098202562}

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