4.9x^2+2x-350=0

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Solution for 4.9x^2+2x-350=0 equation:


Simplifying
4.9x2 + 2x + -350 = 0

Reorder the terms:
-350 + 2x + 4.9x2 = 0

Solving
-350 + 2x + 4.9x2 = 0

Solving for variable 'x'.

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

Divide each side by '4.9'.
-71.42857143 + 0.4081632653x + x2 = 0

Move the constant term to the right:

Add '71.42857143' to each side of the equation.
-71.42857143 + 0.4081632653x + 71.42857143 + x2 = 0 + 71.42857143

Reorder the terms:
-71.42857143 + 71.42857143 + 0.4081632653x + x2 = 0 + 71.42857143

Combine like terms: -71.42857143 + 71.42857143 = 0.00000000
0.00000000 + 0.4081632653x + x2 = 0 + 71.42857143
0.4081632653x + x2 = 0 + 71.42857143

Combine like terms: 0 + 71.42857143 = 71.42857143
0.4081632653x + x2 = 71.42857143

The x term is 0.4081632653x.  Take half its coefficient (0.2040816327).
Square it (0.04164931281) and add it to both sides.

Add '0.04164931281' to each side of the equation.
0.4081632653x + 0.04164931281 + x2 = 71.42857143 + 0.04164931281

Reorder the terms:
0.04164931281 + 0.4081632653x + x2 = 71.42857143 + 0.04164931281

Combine like terms: 71.42857143 + 0.04164931281 = 71.47022074281
0.04164931281 + 0.4081632653x + x2 = 71.47022074281

Factor a perfect square on the left side:
(x + 0.2040816327)(x + 0.2040816327) = 71.47022074281

Calculate the square root of the right side: 8.454006195

Break this problem into two subproblems by setting 
(x + 0.2040816327) equal to 8.454006195 and -8.454006195.

Subproblem 1

x + 0.2040816327 = 8.454006195 Simplifying x + 0.2040816327 = 8.454006195 Reorder the terms: 0.2040816327 + x = 8.454006195 Solving 0.2040816327 + x = 8.454006195 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2040816327' to each side of the equation. 0.2040816327 + -0.2040816327 + x = 8.454006195 + -0.2040816327 Combine like terms: 0.2040816327 + -0.2040816327 = 0.0000000000 0.0000000000 + x = 8.454006195 + -0.2040816327 x = 8.454006195 + -0.2040816327 Combine like terms: 8.454006195 + -0.2040816327 = 8.2499245623 x = 8.2499245623 Simplifying x = 8.2499245623

Subproblem 2

x + 0.2040816327 = -8.454006195 Simplifying x + 0.2040816327 = -8.454006195 Reorder the terms: 0.2040816327 + x = -8.454006195 Solving 0.2040816327 + x = -8.454006195 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2040816327' to each side of the equation. 0.2040816327 + -0.2040816327 + x = -8.454006195 + -0.2040816327 Combine like terms: 0.2040816327 + -0.2040816327 = 0.0000000000 0.0000000000 + x = -8.454006195 + -0.2040816327 x = -8.454006195 + -0.2040816327 Combine like terms: -8.454006195 + -0.2040816327 = -8.6580878277 x = -8.6580878277 Simplifying x = -8.6580878277

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.2499245623, -8.6580878277}

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