4x^2+2x-41.999=0

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Solution for 4x^2+2x-41.999=0 equation:


Simplifying
4x2 + 2x + -41.999 = 0

Reorder the terms:
-41.999 + 2x + 4x2 = 0

Solving
-41.999 + 2x + 4x2 = 0

Solving for variable 'x'.

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

Divide each side by '4'.
-10.49975 + 0.5x + x2 = 0

Move the constant term to the right:

Add '10.49975' to each side of the equation.
-10.49975 + 0.5x + 10.49975 + x2 = 0 + 10.49975

Reorder the terms:
-10.49975 + 10.49975 + 0.5x + x2 = 0 + 10.49975

Combine like terms: -10.49975 + 10.49975 = 0.00000
0.00000 + 0.5x + x2 = 0 + 10.49975
0.5x + x2 = 0 + 10.49975

Combine like terms: 0 + 10.49975 = 10.49975
0.5x + x2 = 10.49975

The x term is 0.5x.  Take half its coefficient (0.25).
Square it (0.0625) and add it to both sides.

Add '0.0625' to each side of the equation.
0.5x + 0.0625 + x2 = 10.49975 + 0.0625

Reorder the terms:
0.0625 + 0.5x + x2 = 10.49975 + 0.0625

Combine like terms: 10.49975 + 0.0625 = 10.56225
0.0625 + 0.5x + x2 = 10.56225

Factor a perfect square on the left side:
(x + 0.25)(x + 0.25) = 10.56225

Calculate the square root of the right side: 3.249961538

Break this problem into two subproblems by setting 
(x + 0.25) equal to 3.249961538 and -3.249961538.

Subproblem 1

x + 0.25 = 3.249961538 Simplifying x + 0.25 = 3.249961538 Reorder the terms: 0.25 + x = 3.249961538 Solving 0.25 + x = 3.249961538 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.25' to each side of the equation. 0.25 + -0.25 + x = 3.249961538 + -0.25 Combine like terms: 0.25 + -0.25 = 0.00 0.00 + x = 3.249961538 + -0.25 x = 3.249961538 + -0.25 Combine like terms: 3.249961538 + -0.25 = 2.999961538 x = 2.999961538 Simplifying x = 2.999961538

Subproblem 2

x + 0.25 = -3.249961538 Simplifying x + 0.25 = -3.249961538 Reorder the terms: 0.25 + x = -3.249961538 Solving 0.25 + x = -3.249961538 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.25' to each side of the equation. 0.25 + -0.25 + x = -3.249961538 + -0.25 Combine like terms: 0.25 + -0.25 = 0.00 0.00 + x = -3.249961538 + -0.25 x = -3.249961538 + -0.25 Combine like terms: -3.249961538 + -0.25 = -3.499961538 x = -3.499961538 Simplifying x = -3.499961538

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.999961538, -3.499961538}

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