-.005x^2+.17x+3=3.6

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Solution for -.005x^2+.17x+3=3.6 equation:


Simplifying
-0.005x2 + 0.17x + 3 = 3.6

Reorder the terms:
3 + 0.17x + -0.005x2 = 3.6

Solving
3 + 0.17x + -0.005x2 = 3.6

Solving for variable 'x'.

Reorder the terms:
3 + -3.6 + 0.17x + -0.005x2 = 3.6 + -3.6

Combine like terms: 3 + -3.6 = -0.6
-0.6 + 0.17x + -0.005x2 = 3.6 + -3.6

Combine like terms: 3.6 + -3.6 = 0.0
-0.6 + 0.17x + -0.005x2 = 0.0

Begin completing the square.  Divide all terms by
-0.005 the coefficient of the squared term: 

Divide each side by '-0.005'.
120 + -34x + x2 = 0

Move the constant term to the right:

Add '-120' to each side of the equation.
120 + -34x + -120 + x2 = 0 + -120

Reorder the terms:
120 + -120 + -34x + x2 = 0 + -120

Combine like terms: 120 + -120 = 0
0 + -34x + x2 = 0 + -120
-34x + x2 = 0 + -120

Combine like terms: 0 + -120 = -120
-34x + x2 = -120

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 = -120 + 289

Reorder the terms:
289 + -34x + x2 = -120 + 289

Combine like terms: -120 + 289 = 169
289 + -34x + x2 = 169

Factor a perfect square on the left side:
(x + -17)(x + -17) = 169

Calculate the square root of the right side: 13

Break this problem into two subproblems by setting 
(x + -17) equal to 13 and -13.

Subproblem 1

x + -17 = 13 Simplifying x + -17 = 13 Reorder the terms: -17 + x = 13 Solving -17 + x = 13 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 = 13 + 17 Combine like terms: -17 + 17 = 0 0 + x = 13 + 17 x = 13 + 17 Combine like terms: 13 + 17 = 30 x = 30 Simplifying x = 30

Subproblem 2

x + -17 = -13 Simplifying x + -17 = -13 Reorder the terms: -17 + x = -13 Solving -17 + x = -13 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 = -13 + 17 Combine like terms: -17 + 17 = 0 0 + x = -13 + 17 x = -13 + 17 Combine like terms: -13 + 17 = 4 x = 4 Simplifying x = 4

Solution

The solution to the problem is based on the solutions from the subproblems. x = {30, 4}

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