16x^2+40x+23=0

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Solution for 16x^2+40x+23=0 equation:


Simplifying
16x2 + 40x + 23 = 0

Reorder the terms:
23 + 40x + 16x2 = 0

Solving
23 + 40x + 16x2 = 0

Solving for variable 'x'.

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

Divide each side by '16'.
1.4375 + 2.5x + x2 = 0

Move the constant term to the right:

Add '-1.4375' to each side of the equation.
1.4375 + 2.5x + -1.4375 + x2 = 0 + -1.4375

Reorder the terms:
1.4375 + -1.4375 + 2.5x + x2 = 0 + -1.4375

Combine like terms: 1.4375 + -1.4375 = 0.0000
0.0000 + 2.5x + x2 = 0 + -1.4375
2.5x + x2 = 0 + -1.4375

Combine like terms: 0 + -1.4375 = -1.4375
2.5x + x2 = -1.4375

The x term is 2.5x.  Take half its coefficient (1.25).
Square it (1.5625) and add it to both sides.

Add '1.5625' to each side of the equation.
2.5x + 1.5625 + x2 = -1.4375 + 1.5625

Reorder the terms:
1.5625 + 2.5x + x2 = -1.4375 + 1.5625

Combine like terms: -1.4375 + 1.5625 = 0.125
1.5625 + 2.5x + x2 = 0.125

Factor a perfect square on the left side:
(x + 1.25)(x + 1.25) = 0.125

Calculate the square root of the right side: 0.353553391

Break this problem into two subproblems by setting 
(x + 1.25) equal to 0.353553391 and -0.353553391.

Subproblem 1

x + 1.25 = 0.353553391 Simplifying x + 1.25 = 0.353553391 Reorder the terms: 1.25 + x = 0.353553391 Solving 1.25 + x = 0.353553391 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.25' to each side of the equation. 1.25 + -1.25 + x = 0.353553391 + -1.25 Combine like terms: 1.25 + -1.25 = 0.00 0.00 + x = 0.353553391 + -1.25 x = 0.353553391 + -1.25 Combine like terms: 0.353553391 + -1.25 = -0.896446609 x = -0.896446609 Simplifying x = -0.896446609

Subproblem 2

x + 1.25 = -0.353553391 Simplifying x + 1.25 = -0.353553391 Reorder the terms: 1.25 + x = -0.353553391 Solving 1.25 + x = -0.353553391 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.25' to each side of the equation. 1.25 + -1.25 + x = -0.353553391 + -1.25 Combine like terms: 1.25 + -1.25 = 0.00 0.00 + x = -0.353553391 + -1.25 x = -0.353553391 + -1.25 Combine like terms: -0.353553391 + -1.25 = -1.603553391 x = -1.603553391 Simplifying x = -1.603553391

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.896446609, -1.603553391}

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