1+17x+-8x^2=0

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Solution for 1+17x+-8x^2=0 equation:


Simplifying
1 + 17x + -8x2 = 0

Solving
1 + 17x + -8x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-8 the coefficient of the squared term: 

Divide each side by '-8'.
-0.125 + -2.125x + x2 = 0

Move the constant term to the right:

Add '0.125' to each side of the equation.
-0.125 + -2.125x + 0.125 + x2 = 0 + 0.125

Reorder the terms:
-0.125 + 0.125 + -2.125x + x2 = 0 + 0.125

Combine like terms: -0.125 + 0.125 = 0.000
0.000 + -2.125x + x2 = 0 + 0.125
-2.125x + x2 = 0 + 0.125

Combine like terms: 0 + 0.125 = 0.125
-2.125x + x2 = 0.125

The x term is -2.125x.  Take half its coefficient (-1.0625).
Square it (1.12890625) and add it to both sides.

Add '1.12890625' to each side of the equation.
-2.125x + 1.12890625 + x2 = 0.125 + 1.12890625

Reorder the terms:
1.12890625 + -2.125x + x2 = 0.125 + 1.12890625

Combine like terms: 0.125 + 1.12890625 = 1.25390625
1.12890625 + -2.125x + x2 = 1.25390625

Factor a perfect square on the left side:
(x + -1.0625)(x + -1.0625) = 1.25390625

Calculate the square root of the right side: 1.119779554

Break this problem into two subproblems by setting 
(x + -1.0625) equal to 1.119779554 and -1.119779554.

Subproblem 1

x + -1.0625 = 1.119779554 Simplifying x + -1.0625 = 1.119779554 Reorder the terms: -1.0625 + x = 1.119779554 Solving -1.0625 + x = 1.119779554 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.0625' to each side of the equation. -1.0625 + 1.0625 + x = 1.119779554 + 1.0625 Combine like terms: -1.0625 + 1.0625 = 0.0000 0.0000 + x = 1.119779554 + 1.0625 x = 1.119779554 + 1.0625 Combine like terms: 1.119779554 + 1.0625 = 2.182279554 x = 2.182279554 Simplifying x = 2.182279554

Subproblem 2

x + -1.0625 = -1.119779554 Simplifying x + -1.0625 = -1.119779554 Reorder the terms: -1.0625 + x = -1.119779554 Solving -1.0625 + x = -1.119779554 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.0625' to each side of the equation. -1.0625 + 1.0625 + x = -1.119779554 + 1.0625 Combine like terms: -1.0625 + 1.0625 = 0.0000 0.0000 + x = -1.119779554 + 1.0625 x = -1.119779554 + 1.0625 Combine like terms: -1.119779554 + 1.0625 = -0.057279554 x = -0.057279554 Simplifying x = -0.057279554

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.182279554, -0.057279554}

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