0=-16x^2+63x+92

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Solution for 0=-16x^2+63x+92 equation:


Simplifying
0 = -16x2 + 63x + 92

Reorder the terms:
0 = 92 + 63x + -16x2

Solving
0 = 92 + 63x + -16x2

Solving for variable 'x'.

Combine like terms: 0 + -92 = -92
-92 + -63x + 16x2 = 92 + 63x + -16x2 + -92 + -63x + 16x2

Reorder the terms:
-92 + -63x + 16x2 = 92 + -92 + 63x + -63x + -16x2 + 16x2

Combine like terms: 92 + -92 = 0
-92 + -63x + 16x2 = 0 + 63x + -63x + -16x2 + 16x2
-92 + -63x + 16x2 = 63x + -63x + -16x2 + 16x2

Combine like terms: 63x + -63x = 0
-92 + -63x + 16x2 = 0 + -16x2 + 16x2
-92 + -63x + 16x2 = -16x2 + 16x2

Combine like terms: -16x2 + 16x2 = 0
-92 + -63x + 16x2 = 0

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

Divide each side by '16'.
-5.75 + -3.9375x + x2 = 0

Move the constant term to the right:

Add '5.75' to each side of the equation.
-5.75 + -3.9375x + 5.75 + x2 = 0 + 5.75

Reorder the terms:
-5.75 + 5.75 + -3.9375x + x2 = 0 + 5.75

Combine like terms: -5.75 + 5.75 = 0.00
0.00 + -3.9375x + x2 = 0 + 5.75
-3.9375x + x2 = 0 + 5.75

Combine like terms: 0 + 5.75 = 5.75
-3.9375x + x2 = 5.75

The x term is -3.9375x.  Take half its coefficient (-1.96875).
Square it (3.875976563) and add it to both sides.

Add '3.875976563' to each side of the equation.
-3.9375x + 3.875976563 + x2 = 5.75 + 3.875976563

Reorder the terms:
3.875976563 + -3.9375x + x2 = 5.75 + 3.875976563

Combine like terms: 5.75 + 3.875976563 = 9.625976563
3.875976563 + -3.9375x + x2 = 9.625976563

Factor a perfect square on the left side:
(x + -1.96875)(x + -1.96875) = 9.625976563

Calculate the square root of the right side: 3.102575795

Break this problem into two subproblems by setting 
(x + -1.96875) equal to 3.102575795 and -3.102575795.

Subproblem 1

x + -1.96875 = 3.102575795 Simplifying x + -1.96875 = 3.102575795 Reorder the terms: -1.96875 + x = 3.102575795 Solving -1.96875 + x = 3.102575795 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.96875' to each side of the equation. -1.96875 + 1.96875 + x = 3.102575795 + 1.96875 Combine like terms: -1.96875 + 1.96875 = 0.00000 0.00000 + x = 3.102575795 + 1.96875 x = 3.102575795 + 1.96875 Combine like terms: 3.102575795 + 1.96875 = 5.071325795 x = 5.071325795 Simplifying x = 5.071325795

Subproblem 2

x + -1.96875 = -3.102575795 Simplifying x + -1.96875 = -3.102575795 Reorder the terms: -1.96875 + x = -3.102575795 Solving -1.96875 + x = -3.102575795 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.96875' to each side of the equation. -1.96875 + 1.96875 + x = -3.102575795 + 1.96875 Combine like terms: -1.96875 + 1.96875 = 0.00000 0.00000 + x = -3.102575795 + 1.96875 x = -3.102575795 + 1.96875 Combine like terms: -3.102575795 + 1.96875 = -1.133825795 x = -1.133825795 Simplifying x = -1.133825795

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.071325795, -1.133825795}

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