16x^2+3x-11=0

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Solution for 16x^2+3x-11=0 equation:


Simplifying
16x2 + 3x + -11 = 0

Reorder the terms:
-11 + 3x + 16x2 = 0

Solving
-11 + 3x + 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'.
-0.6875 + 0.1875x + x2 = 0

Move the constant term to the right:

Add '0.6875' to each side of the equation.
-0.6875 + 0.1875x + 0.6875 + x2 = 0 + 0.6875

Reorder the terms:
-0.6875 + 0.6875 + 0.1875x + x2 = 0 + 0.6875

Combine like terms: -0.6875 + 0.6875 = 0.0000
0.0000 + 0.1875x + x2 = 0 + 0.6875
0.1875x + x2 = 0 + 0.6875

Combine like terms: 0 + 0.6875 = 0.6875
0.1875x + x2 = 0.6875

The x term is 0.1875x.  Take half its coefficient (0.09375).
Square it (0.0087890625) and add it to both sides.

Add '0.0087890625' to each side of the equation.
0.1875x + 0.0087890625 + x2 = 0.6875 + 0.0087890625

Reorder the terms:
0.0087890625 + 0.1875x + x2 = 0.6875 + 0.0087890625

Combine like terms: 0.6875 + 0.0087890625 = 0.6962890625
0.0087890625 + 0.1875x + x2 = 0.6962890625

Factor a perfect square on the left side:
(x + 0.09375)(x + 0.09375) = 0.6962890625

Calculate the square root of the right side: 0.83443937

Break this problem into two subproblems by setting 
(x + 0.09375) equal to 0.83443937 and -0.83443937.

Subproblem 1

x + 0.09375 = 0.83443937 Simplifying x + 0.09375 = 0.83443937 Reorder the terms: 0.09375 + x = 0.83443937 Solving 0.09375 + x = 0.83443937 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.09375' to each side of the equation. 0.09375 + -0.09375 + x = 0.83443937 + -0.09375 Combine like terms: 0.09375 + -0.09375 = 0.00000 0.00000 + x = 0.83443937 + -0.09375 x = 0.83443937 + -0.09375 Combine like terms: 0.83443937 + -0.09375 = 0.74068937 x = 0.74068937 Simplifying x = 0.74068937

Subproblem 2

x + 0.09375 = -0.83443937 Simplifying x + 0.09375 = -0.83443937 Reorder the terms: 0.09375 + x = -0.83443937 Solving 0.09375 + x = -0.83443937 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.09375' to each side of the equation. 0.09375 + -0.09375 + x = -0.83443937 + -0.09375 Combine like terms: 0.09375 + -0.09375 = 0.00000 0.00000 + x = -0.83443937 + -0.09375 x = -0.83443937 + -0.09375 Combine like terms: -0.83443937 + -0.09375 = -0.92818937 x = -0.92818937 Simplifying x = -0.92818937

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.74068937, -0.92818937}

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