-16x^2+116x+84=125

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Solution for -16x^2+116x+84=125 equation:


Simplifying
-16x2 + 116x + 84 = 125

Reorder the terms:
84 + 116x + -16x2 = 125

Solving
84 + 116x + -16x2 = 125

Solving for variable 'x'.

Reorder the terms:
84 + -125 + 116x + -16x2 = 125 + -125

Combine like terms: 84 + -125 = -41
-41 + 116x + -16x2 = 125 + -125

Combine like terms: 125 + -125 = 0
-41 + 116x + -16x2 = 0

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

Divide each side by '-16'.
2.5625 + -7.25x + x2 = 0

Move the constant term to the right:

Add '-2.5625' to each side of the equation.
2.5625 + -7.25x + -2.5625 + x2 = 0 + -2.5625

Reorder the terms:
2.5625 + -2.5625 + -7.25x + x2 = 0 + -2.5625

Combine like terms: 2.5625 + -2.5625 = 0.0000
0.0000 + -7.25x + x2 = 0 + -2.5625
-7.25x + x2 = 0 + -2.5625

Combine like terms: 0 + -2.5625 = -2.5625
-7.25x + x2 = -2.5625

The x term is -7.25x.  Take half its coefficient (-3.625).
Square it (13.140625) and add it to both sides.

Add '13.140625' to each side of the equation.
-7.25x + 13.140625 + x2 = -2.5625 + 13.140625

Reorder the terms:
13.140625 + -7.25x + x2 = -2.5625 + 13.140625

Combine like terms: -2.5625 + 13.140625 = 10.578125
13.140625 + -7.25x + x2 = 10.578125

Factor a perfect square on the left side:
(x + -3.625)(x + -3.625) = 10.578125

Calculate the square root of the right side: 3.252402958

Break this problem into two subproblems by setting 
(x + -3.625) equal to 3.252402958 and -3.252402958.

Subproblem 1

x + -3.625 = 3.252402958 Simplifying x + -3.625 = 3.252402958 Reorder the terms: -3.625 + x = 3.252402958 Solving -3.625 + x = 3.252402958 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.625' to each side of the equation. -3.625 + 3.625 + x = 3.252402958 + 3.625 Combine like terms: -3.625 + 3.625 = 0.000 0.000 + x = 3.252402958 + 3.625 x = 3.252402958 + 3.625 Combine like terms: 3.252402958 + 3.625 = 6.877402958 x = 6.877402958 Simplifying x = 6.877402958

Subproblem 2

x + -3.625 = -3.252402958 Simplifying x + -3.625 = -3.252402958 Reorder the terms: -3.625 + x = -3.252402958 Solving -3.625 + x = -3.252402958 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.625' to each side of the equation. -3.625 + 3.625 + x = -3.252402958 + 3.625 Combine like terms: -3.625 + 3.625 = 0.000 0.000 + x = -3.252402958 + 3.625 x = -3.252402958 + 3.625 Combine like terms: -3.252402958 + 3.625 = 0.372597042 x = 0.372597042 Simplifying x = 0.372597042

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.877402958, 0.372597042}

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