x=-16x^2+32x+64

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Solution for x=-16x^2+32x+64 equation:


Simplifying
x = -16x2 + 32x + 64

Reorder the terms:
x = 64 + 32x + -16x2

Solving
x = 64 + 32x + -16x2

Solving for variable 'x'.

Reorder the terms:
-64 + x + -32x + 16x2 = 64 + 32x + -16x2 + -64 + -32x + 16x2

Combine like terms: x + -32x = -31x
-64 + -31x + 16x2 = 64 + 32x + -16x2 + -64 + -32x + 16x2

Reorder the terms:
-64 + -31x + 16x2 = 64 + -64 + 32x + -32x + -16x2 + 16x2

Combine like terms: 64 + -64 = 0
-64 + -31x + 16x2 = 0 + 32x + -32x + -16x2 + 16x2
-64 + -31x + 16x2 = 32x + -32x + -16x2 + 16x2

Combine like terms: 32x + -32x = 0
-64 + -31x + 16x2 = 0 + -16x2 + 16x2
-64 + -31x + 16x2 = -16x2 + 16x2

Combine like terms: -16x2 + 16x2 = 0
-64 + -31x + 16x2 = 0

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

Divide each side by '16'.
-4 + -1.9375x + x2 = 0

Move the constant term to the right:

Add '4' to each side of the equation.
-4 + -1.9375x + 4 + x2 = 0 + 4

Reorder the terms:
-4 + 4 + -1.9375x + x2 = 0 + 4

Combine like terms: -4 + 4 = 0
0 + -1.9375x + x2 = 0 + 4
-1.9375x + x2 = 0 + 4

Combine like terms: 0 + 4 = 4
-1.9375x + x2 = 4

The x term is -1.9375x.  Take half its coefficient (-0.96875).
Square it (0.9384765625) and add it to both sides.

Add '0.9384765625' to each side of the equation.
-1.9375x + 0.9384765625 + x2 = 4 + 0.9384765625

Reorder the terms:
0.9384765625 + -1.9375x + x2 = 4 + 0.9384765625

Combine like terms: 4 + 0.9384765625 = 4.9384765625
0.9384765625 + -1.9375x + x2 = 4.9384765625

Factor a perfect square on the left side:
(x + -0.96875)(x + -0.96875) = 4.9384765625

Calculate the square root of the right side: 2.222268337

Break this problem into two subproblems by setting 
(x + -0.96875) equal to 2.222268337 and -2.222268337.

Subproblem 1

x + -0.96875 = 2.222268337 Simplifying x + -0.96875 = 2.222268337 Reorder the terms: -0.96875 + x = 2.222268337 Solving -0.96875 + x = 2.222268337 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.96875' to each side of the equation. -0.96875 + 0.96875 + x = 2.222268337 + 0.96875 Combine like terms: -0.96875 + 0.96875 = 0.00000 0.00000 + x = 2.222268337 + 0.96875 x = 2.222268337 + 0.96875 Combine like terms: 2.222268337 + 0.96875 = 3.191018337 x = 3.191018337 Simplifying x = 3.191018337

Subproblem 2

x + -0.96875 = -2.222268337 Simplifying x + -0.96875 = -2.222268337 Reorder the terms: -0.96875 + x = -2.222268337 Solving -0.96875 + x = -2.222268337 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.96875' to each side of the equation. -0.96875 + 0.96875 + x = -2.222268337 + 0.96875 Combine like terms: -0.96875 + 0.96875 = 0.00000 0.00000 + x = -2.222268337 + 0.96875 x = -2.222268337 + 0.96875 Combine like terms: -2.222268337 + 0.96875 = -1.253518337 x = -1.253518337 Simplifying x = -1.253518337

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.191018337, -1.253518337}

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