16x^2+3x-4=0

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Solution for 16x^2+3x-4=0 equation:


Simplifying
16x2 + 3x + -4 = 0

Reorder the terms:
-4 + 3x + 16x2 = 0

Solving
-4 + 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'.
-0.25 + 0.1875x + x2 = 0

Move the constant term to the right:

Add '0.25' to each side of the equation.
-0.25 + 0.1875x + 0.25 + x2 = 0 + 0.25

Reorder the terms:
-0.25 + 0.25 + 0.1875x + x2 = 0 + 0.25

Combine like terms: -0.25 + 0.25 = 0.00
0.00 + 0.1875x + x2 = 0 + 0.25
0.1875x + x2 = 0 + 0.25

Combine like terms: 0 + 0.25 = 0.25
0.1875x + x2 = 0.25

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 = 0.25 + 0.0087890625

Reorder the terms:
0.0087890625 + 0.1875x + x2 = 0.25 + 0.0087890625

Combine like terms: 0.25 + 0.0087890625 = 0.2587890625
0.0087890625 + 0.1875x + x2 = 0.2587890625

Factor a perfect square on the left side:
(x + 0.09375)(x + 0.09375) = 0.2587890625

Calculate the square root of the right side: 0.508713144

Break this problem into two subproblems by setting 
(x + 0.09375) equal to 0.508713144 and -0.508713144.

Subproblem 1

x + 0.09375 = 0.508713144 Simplifying x + 0.09375 = 0.508713144 Reorder the terms: 0.09375 + x = 0.508713144 Solving 0.09375 + x = 0.508713144 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 = 0.508713144 + -0.09375 Combine like terms: 0.09375 + -0.09375 = 0.00000 0.00000 + x = 0.508713144 + -0.09375 x = 0.508713144 + -0.09375 Combine like terms: 0.508713144 + -0.09375 = 0.414963144 x = 0.414963144 Simplifying x = 0.414963144

Subproblem 2

x + 0.09375 = -0.508713144 Simplifying x + 0.09375 = -0.508713144 Reorder the terms: 0.09375 + x = -0.508713144 Solving 0.09375 + x = -0.508713144 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 = -0.508713144 + -0.09375 Combine like terms: 0.09375 + -0.09375 = 0.00000 0.00000 + x = -0.508713144 + -0.09375 x = -0.508713144 + -0.09375 Combine like terms: -0.508713144 + -0.09375 = -0.602463144 x = -0.602463144 Simplifying x = -0.602463144

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.414963144, -0.602463144}

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