17x^2-3x-15=0

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Solution for 17x^2-3x-15=0 equation:


Simplifying
17x2 + -3x + -15 = 0

Reorder the terms:
-15 + -3x + 17x2 = 0

Solving
-15 + -3x + 17x2 = 0

Solving for variable 'x'.

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

Divide each side by '17'.
-0.8823529412 + -0.1764705882x + x2 = 0

Move the constant term to the right:

Add '0.8823529412' to each side of the equation.
-0.8823529412 + -0.1764705882x + 0.8823529412 + x2 = 0 + 0.8823529412

Reorder the terms:
-0.8823529412 + 0.8823529412 + -0.1764705882x + x2 = 0 + 0.8823529412

Combine like terms: -0.8823529412 + 0.8823529412 = 0.0000000000
0.0000000000 + -0.1764705882x + x2 = 0 + 0.8823529412
-0.1764705882x + x2 = 0 + 0.8823529412

Combine like terms: 0 + 0.8823529412 = 0.8823529412
-0.1764705882x + x2 = 0.8823529412

The x term is -0.1764705882x.  Take half its coefficient (-0.0882352941).
Square it (0.007785467125) and add it to both sides.

Add '0.007785467125' to each side of the equation.
-0.1764705882x + 0.007785467125 + x2 = 0.8823529412 + 0.007785467125

Reorder the terms:
0.007785467125 + -0.1764705882x + x2 = 0.8823529412 + 0.007785467125

Combine like terms: 0.8823529412 + 0.007785467125 = 0.890138408325
0.007785467125 + -0.1764705882x + x2 = 0.890138408325

Factor a perfect square on the left side:
(x + -0.0882352941)(x + -0.0882352941) = 0.890138408325

Calculate the square root of the right side: 0.943471467

Break this problem into two subproblems by setting 
(x + -0.0882352941) equal to 0.943471467 and -0.943471467.

Subproblem 1

x + -0.0882352941 = 0.943471467 Simplifying x + -0.0882352941 = 0.943471467 Reorder the terms: -0.0882352941 + x = 0.943471467 Solving -0.0882352941 + x = 0.943471467 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.0882352941' to each side of the equation. -0.0882352941 + 0.0882352941 + x = 0.943471467 + 0.0882352941 Combine like terms: -0.0882352941 + 0.0882352941 = 0.0000000000 0.0000000000 + x = 0.943471467 + 0.0882352941 x = 0.943471467 + 0.0882352941 Combine like terms: 0.943471467 + 0.0882352941 = 1.0317067611 x = 1.0317067611 Simplifying x = 1.0317067611

Subproblem 2

x + -0.0882352941 = -0.943471467 Simplifying x + -0.0882352941 = -0.943471467 Reorder the terms: -0.0882352941 + x = -0.943471467 Solving -0.0882352941 + x = -0.943471467 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.0882352941' to each side of the equation. -0.0882352941 + 0.0882352941 + x = -0.943471467 + 0.0882352941 Combine like terms: -0.0882352941 + 0.0882352941 = 0.0000000000 0.0000000000 + x = -0.943471467 + 0.0882352941 x = -0.943471467 + 0.0882352941 Combine like terms: -0.943471467 + 0.0882352941 = -0.8552361729 x = -0.8552361729 Simplifying x = -0.8552361729

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.0317067611, -0.8552361729}

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