16x^2+31x+2=0

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Solution for 16x^2+31x+2=0 equation:


Simplifying
16x2 + 31x + 2 = 0

Reorder the terms:
2 + 31x + 16x2 = 0

Solving
2 + 31x + 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'.
0.125 + 1.9375x + x2 = 0

Move the constant term to the right:

Add '-0.125' to each side of the equation.
0.125 + 1.9375x + -0.125 + x2 = 0 + -0.125

Reorder the terms:
0.125 + -0.125 + 1.9375x + x2 = 0 + -0.125

Combine like terms: 0.125 + -0.125 = 0.000
0.000 + 1.9375x + x2 = 0 + -0.125
1.9375x + x2 = 0 + -0.125

Combine like terms: 0 + -0.125 = -0.125
1.9375x + x2 = -0.125

The x term is 1.9375x.  Take half its coefficient (0.96875).
Square it (0.9384765625) and add it to both sides.

Add '0.9384765625' to each side of the equation.
1.9375x + 0.9384765625 + x2 = -0.125 + 0.9384765625

Reorder the terms:
0.9384765625 + 1.9375x + x2 = -0.125 + 0.9384765625

Combine like terms: -0.125 + 0.9384765625 = 0.8134765625
0.9384765625 + 1.9375x + x2 = 0.8134765625

Factor a perfect square on the left side:
(x + 0.96875)(x + 0.96875) = 0.8134765625

Calculate the square root of the right side: 0.901929356

Break this problem into two subproblems by setting 
(x + 0.96875) equal to 0.901929356 and -0.901929356.

Subproblem 1

x + 0.96875 = 0.901929356 Simplifying x + 0.96875 = 0.901929356 Reorder the terms: 0.96875 + x = 0.901929356 Solving 0.96875 + x = 0.901929356 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.96875' to each side of the equation. 0.96875 + -0.96875 + x = 0.901929356 + -0.96875 Combine like terms: 0.96875 + -0.96875 = 0.00000 0.00000 + x = 0.901929356 + -0.96875 x = 0.901929356 + -0.96875 Combine like terms: 0.901929356 + -0.96875 = -0.066820644 x = -0.066820644 Simplifying x = -0.066820644

Subproblem 2

x + 0.96875 = -0.901929356 Simplifying x + 0.96875 = -0.901929356 Reorder the terms: 0.96875 + x = -0.901929356 Solving 0.96875 + x = -0.901929356 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.96875' to each side of the equation. 0.96875 + -0.96875 + x = -0.901929356 + -0.96875 Combine like terms: 0.96875 + -0.96875 = 0.00000 0.00000 + x = -0.901929356 + -0.96875 x = -0.901929356 + -0.96875 Combine like terms: -0.901929356 + -0.96875 = -1.870679356 x = -1.870679356 Simplifying x = -1.870679356

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.066820644, -1.870679356}

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