2x^2+19x-7.1=0

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Solution for 2x^2+19x-7.1=0 equation:


Simplifying
2x2 + 19x + -7.1 = 0

Reorder the terms:
-7.1 + 19x + 2x2 = 0

Solving
-7.1 + 19x + 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'.
-3.55 + 9.5x + x2 = 0

Move the constant term to the right:

Add '3.55' to each side of the equation.
-3.55 + 9.5x + 3.55 + x2 = 0 + 3.55

Reorder the terms:
-3.55 + 3.55 + 9.5x + x2 = 0 + 3.55

Combine like terms: -3.55 + 3.55 = 0.00
0.00 + 9.5x + x2 = 0 + 3.55
9.5x + x2 = 0 + 3.55

Combine like terms: 0 + 3.55 = 3.55
9.5x + x2 = 3.55

The x term is 9.5x.  Take half its coefficient (4.75).
Square it (22.5625) and add it to both sides.

Add '22.5625' to each side of the equation.
9.5x + 22.5625 + x2 = 3.55 + 22.5625

Reorder the terms:
22.5625 + 9.5x + x2 = 3.55 + 22.5625

Combine like terms: 3.55 + 22.5625 = 26.1125
22.5625 + 9.5x + x2 = 26.1125

Factor a perfect square on the left side:
(x + 4.75)(x + 4.75) = 26.1125

Calculate the square root of the right side: 5.110039139

Break this problem into two subproblems by setting 
(x + 4.75) equal to 5.110039139 and -5.110039139.

Subproblem 1

x + 4.75 = 5.110039139 Simplifying x + 4.75 = 5.110039139 Reorder the terms: 4.75 + x = 5.110039139 Solving 4.75 + x = 5.110039139 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.75' to each side of the equation. 4.75 + -4.75 + x = 5.110039139 + -4.75 Combine like terms: 4.75 + -4.75 = 0.00 0.00 + x = 5.110039139 + -4.75 x = 5.110039139 + -4.75 Combine like terms: 5.110039139 + -4.75 = 0.360039139 x = 0.360039139 Simplifying x = 0.360039139

Subproblem 2

x + 4.75 = -5.110039139 Simplifying x + 4.75 = -5.110039139 Reorder the terms: 4.75 + x = -5.110039139 Solving 4.75 + x = -5.110039139 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.75' to each side of the equation. 4.75 + -4.75 + x = -5.110039139 + -4.75 Combine like terms: 4.75 + -4.75 = 0.00 0.00 + x = -5.110039139 + -4.75 x = -5.110039139 + -4.75 Combine like terms: -5.110039139 + -4.75 = -9.860039139 x = -9.860039139 Simplifying x = -9.860039139

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.360039139, -9.860039139}

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