5.5x-.025x^2=180

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Solution for 5.5x-.025x^2=180 equation:


Simplifying
5.5x + -0.025x2 = 180

Solving
5.5x + -0.025x2 = 180

Solving for variable 'x'.

Reorder the terms:
-180 + 5.5x + -0.025x2 = 180 + -180

Combine like terms: 180 + -180 = 0
-180 + 5.5x + -0.025x2 = 0

Begin completing the square.  Divide all terms by
-0.025 the coefficient of the squared term: 

Divide each side by '-0.025'.
7200 + -220x + x2 = 0

Move the constant term to the right:

Add '-7200' to each side of the equation.
7200 + -220x + -7200 + x2 = 0 + -7200

Reorder the terms:
7200 + -7200 + -220x + x2 = 0 + -7200

Combine like terms: 7200 + -7200 = 0
0 + -220x + x2 = 0 + -7200
-220x + x2 = 0 + -7200

Combine like terms: 0 + -7200 = -7200
-220x + x2 = -7200

The x term is -220x.  Take half its coefficient (-110).
Square it (12100) and add it to both sides.

Add '12100' to each side of the equation.
-220x + 12100 + x2 = -7200 + 12100

Reorder the terms:
12100 + -220x + x2 = -7200 + 12100

Combine like terms: -7200 + 12100 = 4900
12100 + -220x + x2 = 4900

Factor a perfect square on the left side:
(x + -110)(x + -110) = 4900

Calculate the square root of the right side: 70

Break this problem into two subproblems by setting 
(x + -110) equal to 70 and -70.

Subproblem 1

x + -110 = 70 Simplifying x + -110 = 70 Reorder the terms: -110 + x = 70 Solving -110 + x = 70 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '110' to each side of the equation. -110 + 110 + x = 70 + 110 Combine like terms: -110 + 110 = 0 0 + x = 70 + 110 x = 70 + 110 Combine like terms: 70 + 110 = 180 x = 180 Simplifying x = 180

Subproblem 2

x + -110 = -70 Simplifying x + -110 = -70 Reorder the terms: -110 + x = -70 Solving -110 + x = -70 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '110' to each side of the equation. -110 + 110 + x = -70 + 110 Combine like terms: -110 + 110 = 0 0 + x = -70 + 110 x = -70 + 110 Combine like terms: -70 + 110 = 40 x = 40 Simplifying x = 40

Solution

The solution to the problem is based on the solutions from the subproblems. x = {180, 40}

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