18x^2+19x-5=0

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Solution for 18x^2+19x-5=0 equation:


Simplifying
18x2 + 19x + -5 = 0

Reorder the terms:
-5 + 19x + 18x2 = 0

Solving
-5 + 19x + 18x2 = 0

Solving for variable 'x'.

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

Divide each side by '18'.
-0.2777777778 + 1.055555556x + x2 = 0

Move the constant term to the right:

Add '0.2777777778' to each side of the equation.
-0.2777777778 + 1.055555556x + 0.2777777778 + x2 = 0 + 0.2777777778

Reorder the terms:
-0.2777777778 + 0.2777777778 + 1.055555556x + x2 = 0 + 0.2777777778

Combine like terms: -0.2777777778 + 0.2777777778 = 0.0000000000
0.0000000000 + 1.055555556x + x2 = 0 + 0.2777777778
1.055555556x + x2 = 0 + 0.2777777778

Combine like terms: 0 + 0.2777777778 = 0.2777777778
1.055555556x + x2 = 0.2777777778

The x term is 1.055555556x.  Take half its coefficient (0.527777778).
Square it (0.2785493830) and add it to both sides.

Add '0.2785493830' to each side of the equation.
1.055555556x + 0.2785493830 + x2 = 0.2777777778 + 0.2785493830

Reorder the terms:
0.2785493830 + 1.055555556x + x2 = 0.2777777778 + 0.2785493830

Combine like terms: 0.2777777778 + 0.2785493830 = 0.5563271608
0.2785493830 + 1.055555556x + x2 = 0.5563271608

Factor a perfect square on the left side:
(x + 0.527777778)(x + 0.527777778) = 0.5563271608

Calculate the square root of the right side: 0.745873421

Break this problem into two subproblems by setting 
(x + 0.527777778) equal to 0.745873421 and -0.745873421.

Subproblem 1

x + 0.527777778 = 0.745873421 Simplifying x + 0.527777778 = 0.745873421 Reorder the terms: 0.527777778 + x = 0.745873421 Solving 0.527777778 + x = 0.745873421 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.527777778' to each side of the equation. 0.527777778 + -0.527777778 + x = 0.745873421 + -0.527777778 Combine like terms: 0.527777778 + -0.527777778 = 0.000000000 0.000000000 + x = 0.745873421 + -0.527777778 x = 0.745873421 + -0.527777778 Combine like terms: 0.745873421 + -0.527777778 = 0.218095643 x = 0.218095643 Simplifying x = 0.218095643

Subproblem 2

x + 0.527777778 = -0.745873421 Simplifying x + 0.527777778 = -0.745873421 Reorder the terms: 0.527777778 + x = -0.745873421 Solving 0.527777778 + x = -0.745873421 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.527777778' to each side of the equation. 0.527777778 + -0.527777778 + x = -0.745873421 + -0.527777778 Combine like terms: 0.527777778 + -0.527777778 = 0.000000000 0.000000000 + x = -0.745873421 + -0.527777778 x = -0.745873421 + -0.527777778 Combine like terms: -0.745873421 + -0.527777778 = -1.273651199 x = -1.273651199 Simplifying x = -1.273651199

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.218095643, -1.273651199}

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