x^2-3x-17=0

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


Simplifying
x2 + -3x + -17 = 0

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

Solving
-17 + -3x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '17' to each side of the equation.
-17 + -3x + 17 + x2 = 0 + 17

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

Combine like terms: -17 + 17 = 0
0 + -3x + x2 = 0 + 17
-3x + x2 = 0 + 17

Combine like terms: 0 + 17 = 17
-3x + x2 = 17

The x term is -3x.  Take half its coefficient (-1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
-3x + 2.25 + x2 = 17 + 2.25

Reorder the terms:
2.25 + -3x + x2 = 17 + 2.25

Combine like terms: 17 + 2.25 = 19.25
2.25 + -3x + x2 = 19.25

Factor a perfect square on the left side:
(x + -1.5)(x + -1.5) = 19.25

Calculate the square root of the right side: 4.387482194

Break this problem into two subproblems by setting 
(x + -1.5) equal to 4.387482194 and -4.387482194.

Subproblem 1

x + -1.5 = 4.387482194 Simplifying x + -1.5 = 4.387482194 Reorder the terms: -1.5 + x = 4.387482194 Solving -1.5 + x = 4.387482194 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = 4.387482194 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = 4.387482194 + 1.5 x = 4.387482194 + 1.5 Combine like terms: 4.387482194 + 1.5 = 5.887482194 x = 5.887482194 Simplifying x = 5.887482194

Subproblem 2

x + -1.5 = -4.387482194 Simplifying x + -1.5 = -4.387482194 Reorder the terms: -1.5 + x = -4.387482194 Solving -1.5 + x = -4.387482194 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = -4.387482194 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = -4.387482194 + 1.5 x = -4.387482194 + 1.5 Combine like terms: -4.387482194 + 1.5 = -2.887482194 x = -2.887482194 Simplifying x = -2.887482194

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.887482194, -2.887482194}

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