2x^2+29x-7.7=0

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Solution for 2x^2+29x-7.7=0 equation:


Simplifying
2x2 + 29x + -7.7 = 0

Reorder the terms:
-7.7 + 29x + 2x2 = 0

Solving
-7.7 + 29x + 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'.
-3.85 + 14.5x + x2 = 0

Move the constant term to the right:

Add '3.85' to each side of the equation.
-3.85 + 14.5x + 3.85 + x2 = 0 + 3.85

Reorder the terms:
-3.85 + 3.85 + 14.5x + x2 = 0 + 3.85

Combine like terms: -3.85 + 3.85 = 0.00
0.00 + 14.5x + x2 = 0 + 3.85
14.5x + x2 = 0 + 3.85

Combine like terms: 0 + 3.85 = 3.85
14.5x + x2 = 3.85

The x term is 14.5x.  Take half its coefficient (7.25).
Square it (52.5625) and add it to both sides.

Add '52.5625' to each side of the equation.
14.5x + 52.5625 + x2 = 3.85 + 52.5625

Reorder the terms:
52.5625 + 14.5x + x2 = 3.85 + 52.5625

Combine like terms: 3.85 + 52.5625 = 56.4125
52.5625 + 14.5x + x2 = 56.4125

Factor a perfect square on the left side:
(x + 7.25)(x + 7.25) = 56.4125

Calculate the square root of the right side: 7.510825521

Break this problem into two subproblems by setting 
(x + 7.25) equal to 7.510825521 and -7.510825521.

Subproblem 1

x + 7.25 = 7.510825521 Simplifying x + 7.25 = 7.510825521 Reorder the terms: 7.25 + x = 7.510825521 Solving 7.25 + x = 7.510825521 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7.25' to each side of the equation. 7.25 + -7.25 + x = 7.510825521 + -7.25 Combine like terms: 7.25 + -7.25 = 0.00 0.00 + x = 7.510825521 + -7.25 x = 7.510825521 + -7.25 Combine like terms: 7.510825521 + -7.25 = 0.260825521 x = 0.260825521 Simplifying x = 0.260825521

Subproblem 2

x + 7.25 = -7.510825521 Simplifying x + 7.25 = -7.510825521 Reorder the terms: 7.25 + x = -7.510825521 Solving 7.25 + x = -7.510825521 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7.25' to each side of the equation. 7.25 + -7.25 + x = -7.510825521 + -7.25 Combine like terms: 7.25 + -7.25 = 0.00 0.00 + x = -7.510825521 + -7.25 x = -7.510825521 + -7.25 Combine like terms: -7.510825521 + -7.25 = -14.760825521 x = -14.760825521 Simplifying x = -14.760825521

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.260825521, -14.760825521}

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