0=-16x^2+100x+5

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Solution for 0=-16x^2+100x+5 equation:


Simplifying
0 = -16x2 + 100x + 5

Reorder the terms:
0 = 5 + 100x + -16x2

Solving
0 = 5 + 100x + -16x2

Solving for variable 'x'.

Combine like terms: 0 + -5 = -5
-5 + -100x + 16x2 = 5 + 100x + -16x2 + -5 + -100x + 16x2

Reorder the terms:
-5 + -100x + 16x2 = 5 + -5 + 100x + -100x + -16x2 + 16x2

Combine like terms: 5 + -5 = 0
-5 + -100x + 16x2 = 0 + 100x + -100x + -16x2 + 16x2
-5 + -100x + 16x2 = 100x + -100x + -16x2 + 16x2

Combine like terms: 100x + -100x = 0
-5 + -100x + 16x2 = 0 + -16x2 + 16x2
-5 + -100x + 16x2 = -16x2 + 16x2

Combine like terms: -16x2 + 16x2 = 0
-5 + -100x + 16x2 = 0

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

Divide each side by '16'.
-0.3125 + -6.25x + x2 = 0

Move the constant term to the right:

Add '0.3125' to each side of the equation.
-0.3125 + -6.25x + 0.3125 + x2 = 0 + 0.3125

Reorder the terms:
-0.3125 + 0.3125 + -6.25x + x2 = 0 + 0.3125

Combine like terms: -0.3125 + 0.3125 = 0.0000
0.0000 + -6.25x + x2 = 0 + 0.3125
-6.25x + x2 = 0 + 0.3125

Combine like terms: 0 + 0.3125 = 0.3125
-6.25x + x2 = 0.3125

The x term is -6.25x.  Take half its coefficient (-3.125).
Square it (9.765625) and add it to both sides.

Add '9.765625' to each side of the equation.
-6.25x + 9.765625 + x2 = 0.3125 + 9.765625

Reorder the terms:
9.765625 + -6.25x + x2 = 0.3125 + 9.765625

Combine like terms: 0.3125 + 9.765625 = 10.078125
9.765625 + -6.25x + x2 = 10.078125

Factor a perfect square on the left side:
(x + -3.125)(x + -3.125) = 10.078125

Calculate the square root of the right side: 3.174606275

Break this problem into two subproblems by setting 
(x + -3.125) equal to 3.174606275 and -3.174606275.

Subproblem 1

x + -3.125 = 3.174606275 Simplifying x + -3.125 = 3.174606275 Reorder the terms: -3.125 + x = 3.174606275 Solving -3.125 + x = 3.174606275 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.125' to each side of the equation. -3.125 + 3.125 + x = 3.174606275 + 3.125 Combine like terms: -3.125 + 3.125 = 0.000 0.000 + x = 3.174606275 + 3.125 x = 3.174606275 + 3.125 Combine like terms: 3.174606275 + 3.125 = 6.299606275 x = 6.299606275 Simplifying x = 6.299606275

Subproblem 2

x + -3.125 = -3.174606275 Simplifying x + -3.125 = -3.174606275 Reorder the terms: -3.125 + x = -3.174606275 Solving -3.125 + x = -3.174606275 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.125' to each side of the equation. -3.125 + 3.125 + x = -3.174606275 + 3.125 Combine like terms: -3.125 + 3.125 = 0.000 0.000 + x = -3.174606275 + 3.125 x = -3.174606275 + 3.125 Combine like terms: -3.174606275 + 3.125 = -0.049606275 x = -0.049606275 Simplifying x = -0.049606275

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.299606275, -0.049606275}

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