-16x^2+104x+56=3.25

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Solution for -16x^2+104x+56=3.25 equation:


Simplifying
-16x2 + 104x + 56 = 3.25

Reorder the terms:
56 + 104x + -16x2 = 3.25

Solving
56 + 104x + -16x2 = 3.25

Solving for variable 'x'.

Reorder the terms:
56 + -3.25 + 104x + -16x2 = 3.25 + -3.25

Combine like terms: 56 + -3.25 = 52.75
52.75 + 104x + -16x2 = 3.25 + -3.25

Combine like terms: 3.25 + -3.25 = 0.00
52.75 + 104x + -16x2 = 0.00

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

Divide each side by '-16'.
-3.296875 + -6.5x + x2 = 0.00

Move the constant term to the right:

Add '3.296875' to each side of the equation.
-3.296875 + -6.5x + 3.296875 + x2 = 0.00 + 3.296875

Reorder the terms:
-3.296875 + 3.296875 + -6.5x + x2 = 0.00 + 3.296875

Combine like terms: -3.296875 + 3.296875 = 0.000000
0.000000 + -6.5x + x2 = 0.00 + 3.296875
-6.5x + x2 = 0.00 + 3.296875

Combine like terms: 0.00 + 3.296875 = 3.296875
-6.5x + x2 = 3.296875

The x term is -6.5x.  Take half its coefficient (-3.25).
Square it (10.5625) and add it to both sides.

Add '10.5625' to each side of the equation.
-6.5x + 10.5625 + x2 = 3.296875 + 10.5625

Reorder the terms:
10.5625 + -6.5x + x2 = 3.296875 + 10.5625

Combine like terms: 3.296875 + 10.5625 = 13.859375
10.5625 + -6.5x + x2 = 13.859375

Factor a perfect square on the left side:
(x + -3.25)(x + -3.25) = 13.859375

Calculate the square root of the right side: 3.722818153

Break this problem into two subproblems by setting 
(x + -3.25) equal to 3.722818153 and -3.722818153.

Subproblem 1

x + -3.25 = 3.722818153 Simplifying x + -3.25 = 3.722818153 Reorder the terms: -3.25 + x = 3.722818153 Solving -3.25 + x = 3.722818153 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.25' to each side of the equation. -3.25 + 3.25 + x = 3.722818153 + 3.25 Combine like terms: -3.25 + 3.25 = 0.00 0.00 + x = 3.722818153 + 3.25 x = 3.722818153 + 3.25 Combine like terms: 3.722818153 + 3.25 = 6.972818153 x = 6.972818153 Simplifying x = 6.972818153

Subproblem 2

x + -3.25 = -3.722818153 Simplifying x + -3.25 = -3.722818153 Reorder the terms: -3.25 + x = -3.722818153 Solving -3.25 + x = -3.722818153 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.25' to each side of the equation. -3.25 + 3.25 + x = -3.722818153 + 3.25 Combine like terms: -3.25 + 3.25 = 0.00 0.00 + x = -3.722818153 + 3.25 x = -3.722818153 + 3.25 Combine like terms: -3.722818153 + 3.25 = -0.472818153 x = -0.472818153 Simplifying x = -0.472818153

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.972818153, -0.472818153}

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