2x^2-17x+18=0

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Solution for 2x^2-17x+18=0 equation:


Simplifying
2x2 + -17x + 18 = 0

Reorder the terms:
18 + -17x + 2x2 = 0

Solving
18 + -17x + 2x2 = 0

Solving for variable 'x'.

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

Divide each side by '2'.
9 + -8.5x + x2 = 0

Move the constant term to the right:

Add '-9' to each side of the equation.
9 + -8.5x + -9 + x2 = 0 + -9

Reorder the terms:
9 + -9 + -8.5x + x2 = 0 + -9

Combine like terms: 9 + -9 = 0
0 + -8.5x + x2 = 0 + -9
-8.5x + x2 = 0 + -9

Combine like terms: 0 + -9 = -9
-8.5x + x2 = -9

The x term is -8.5x.  Take half its coefficient (-4.25).
Square it (18.0625) and add it to both sides.

Add '18.0625' to each side of the equation.
-8.5x + 18.0625 + x2 = -9 + 18.0625

Reorder the terms:
18.0625 + -8.5x + x2 = -9 + 18.0625

Combine like terms: -9 + 18.0625 = 9.0625
18.0625 + -8.5x + x2 = 9.0625

Factor a perfect square on the left side:
(x + -4.25)(x + -4.25) = 9.0625

Calculate the square root of the right side: 3.010398645

Break this problem into two subproblems by setting 
(x + -4.25) equal to 3.010398645 and -3.010398645.

Subproblem 1

x + -4.25 = 3.010398645 Simplifying x + -4.25 = 3.010398645 Reorder the terms: -4.25 + x = 3.010398645 Solving -4.25 + x = 3.010398645 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.25' to each side of the equation. -4.25 + 4.25 + x = 3.010398645 + 4.25 Combine like terms: -4.25 + 4.25 = 0.00 0.00 + x = 3.010398645 + 4.25 x = 3.010398645 + 4.25 Combine like terms: 3.010398645 + 4.25 = 7.260398645 x = 7.260398645 Simplifying x = 7.260398645

Subproblem 2

x + -4.25 = -3.010398645 Simplifying x + -4.25 = -3.010398645 Reorder the terms: -4.25 + x = -3.010398645 Solving -4.25 + x = -3.010398645 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.25' to each side of the equation. -4.25 + 4.25 + x = -3.010398645 + 4.25 Combine like terms: -4.25 + 4.25 = 0.00 0.00 + x = -3.010398645 + 4.25 x = -3.010398645 + 4.25 Combine like terms: -3.010398645 + 4.25 = 1.239601355 x = 1.239601355 Simplifying x = 1.239601355

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.260398645, 1.239601355}

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