0=-16x^2+3x+1.3

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Solution for 0=-16x^2+3x+1.3 equation:


Simplifying
0 = -16x2 + 3x + 1.3

Reorder the terms:
0 = 1.3 + 3x + -16x2

Solving
0 = 1.3 + 3x + -16x2

Solving for variable 'x'.

Combine like terms: 0 + -1.3 = -1.3
-1.3 + -3x + 16x2 = 1.3 + 3x + -16x2 + -1.3 + -3x + 16x2

Reorder the terms:
-1.3 + -3x + 16x2 = 1.3 + -1.3 + 3x + -3x + -16x2 + 16x2

Combine like terms: 1.3 + -1.3 = 0.0
-1.3 + -3x + 16x2 = 0.0 + 3x + -3x + -16x2 + 16x2
-1.3 + -3x + 16x2 = 3x + -3x + -16x2 + 16x2

Combine like terms: 3x + -3x = 0
-1.3 + -3x + 16x2 = 0 + -16x2 + 16x2
-1.3 + -3x + 16x2 = -16x2 + 16x2

Combine like terms: -16x2 + 16x2 = 0
-1.3 + -3x + 16x2 = 0

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

Divide each side by '16'.
-0.08125 + -0.1875x + x2 = 0

Move the constant term to the right:

Add '0.08125' to each side of the equation.
-0.08125 + -0.1875x + 0.08125 + x2 = 0 + 0.08125

Reorder the terms:
-0.08125 + 0.08125 + -0.1875x + x2 = 0 + 0.08125

Combine like terms: -0.08125 + 0.08125 = 0.00000
0.00000 + -0.1875x + x2 = 0 + 0.08125
-0.1875x + x2 = 0 + 0.08125

Combine like terms: 0 + 0.08125 = 0.08125
-0.1875x + x2 = 0.08125

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 = 0.08125 + 0.0087890625

Reorder the terms:
0.0087890625 + -0.1875x + x2 = 0.08125 + 0.0087890625

Combine like terms: 0.08125 + 0.0087890625 = 0.0900390625
0.0087890625 + -0.1875x + x2 = 0.0900390625

Factor a perfect square on the left side:
(x + -0.09375)(x + -0.09375) = 0.0900390625

Calculate the square root of the right side: 0.300065097

Break this problem into two subproblems by setting 
(x + -0.09375) equal to 0.300065097 and -0.300065097.

Subproblem 1

x + -0.09375 = 0.300065097 Simplifying x + -0.09375 = 0.300065097 Reorder the terms: -0.09375 + x = 0.300065097 Solving -0.09375 + x = 0.300065097 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 = 0.300065097 + 0.09375 Combine like terms: -0.09375 + 0.09375 = 0.00000 0.00000 + x = 0.300065097 + 0.09375 x = 0.300065097 + 0.09375 Combine like terms: 0.300065097 + 0.09375 = 0.393815097 x = 0.393815097 Simplifying x = 0.393815097

Subproblem 2

x + -0.09375 = -0.300065097 Simplifying x + -0.09375 = -0.300065097 Reorder the terms: -0.09375 + x = -0.300065097 Solving -0.09375 + x = -0.300065097 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 = -0.300065097 + 0.09375 Combine like terms: -0.09375 + 0.09375 = 0.00000 0.00000 + x = -0.300065097 + 0.09375 x = -0.300065097 + 0.09375 Combine like terms: -0.300065097 + 0.09375 = -0.206315097 x = -0.206315097 Simplifying x = -0.206315097

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.393815097, -0.206315097}

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