0=-15x^2+17x+2

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Solution for 0=-15x^2+17x+2 equation:


Simplifying
0 = -15x2 + 17x + 2

Reorder the terms:
0 = 2 + 17x + -15x2

Solving
0 = 2 + 17x + -15x2

Solving for variable 'x'.

Combine like terms: 0 + -2 = -2
-2 + -17x + 15x2 = 2 + 17x + -15x2 + -2 + -17x + 15x2

Reorder the terms:
-2 + -17x + 15x2 = 2 + -2 + 17x + -17x + -15x2 + 15x2

Combine like terms: 2 + -2 = 0
-2 + -17x + 15x2 = 0 + 17x + -17x + -15x2 + 15x2
-2 + -17x + 15x2 = 17x + -17x + -15x2 + 15x2

Combine like terms: 17x + -17x = 0
-2 + -17x + 15x2 = 0 + -15x2 + 15x2
-2 + -17x + 15x2 = -15x2 + 15x2

Combine like terms: -15x2 + 15x2 = 0
-2 + -17x + 15x2 = 0

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

Divide each side by '15'.
-0.1333333333 + -1.133333333x + x2 = 0

Move the constant term to the right:

Add '0.1333333333' to each side of the equation.
-0.1333333333 + -1.133333333x + 0.1333333333 + x2 = 0 + 0.1333333333

Reorder the terms:
-0.1333333333 + 0.1333333333 + -1.133333333x + x2 = 0 + 0.1333333333

Combine like terms: -0.1333333333 + 0.1333333333 = 0.0000000000
0.0000000000 + -1.133333333x + x2 = 0 + 0.1333333333
-1.133333333x + x2 = 0 + 0.1333333333

Combine like terms: 0 + 0.1333333333 = 0.1333333333
-1.133333333x + x2 = 0.1333333333

The x term is -1.133333333x.  Take half its coefficient (-0.5666666665).
Square it (0.3211111109) and add it to both sides.

Add '0.3211111109' to each side of the equation.
-1.133333333x + 0.3211111109 + x2 = 0.1333333333 + 0.3211111109

Reorder the terms:
0.3211111109 + -1.133333333x + x2 = 0.1333333333 + 0.3211111109

Combine like terms: 0.1333333333 + 0.3211111109 = 0.4544444442
0.3211111109 + -1.133333333x + x2 = 0.4544444442

Factor a perfect square on the left side:
(x + -0.5666666665)(x + -0.5666666665) = 0.4544444442

Calculate the square root of the right side: 0.674124947

Break this problem into two subproblems by setting 
(x + -0.5666666665) equal to 0.674124947 and -0.674124947.

Subproblem 1

x + -0.5666666665 = 0.674124947 Simplifying x + -0.5666666665 = 0.674124947 Reorder the terms: -0.5666666665 + x = 0.674124947 Solving -0.5666666665 + x = 0.674124947 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5666666665' to each side of the equation. -0.5666666665 + 0.5666666665 + x = 0.674124947 + 0.5666666665 Combine like terms: -0.5666666665 + 0.5666666665 = 0.0000000000 0.0000000000 + x = 0.674124947 + 0.5666666665 x = 0.674124947 + 0.5666666665 Combine like terms: 0.674124947 + 0.5666666665 = 1.2407916135 x = 1.2407916135 Simplifying x = 1.2407916135

Subproblem 2

x + -0.5666666665 = -0.674124947 Simplifying x + -0.5666666665 = -0.674124947 Reorder the terms: -0.5666666665 + x = -0.674124947 Solving -0.5666666665 + x = -0.674124947 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5666666665' to each side of the equation. -0.5666666665 + 0.5666666665 + x = -0.674124947 + 0.5666666665 Combine like terms: -0.5666666665 + 0.5666666665 = 0.0000000000 0.0000000000 + x = -0.674124947 + 0.5666666665 x = -0.674124947 + 0.5666666665 Combine like terms: -0.674124947 + 0.5666666665 = -0.1074582805 x = -0.1074582805 Simplifying x = -0.1074582805

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.2407916135, -0.1074582805}

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