x=-16x^2+64x+160

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Solution for x=-16x^2+64x+160 equation:


Simplifying
x = -16x2 + 64x + 160

Reorder the terms:
x = 160 + 64x + -16x2

Solving
x = 160 + 64x + -16x2

Solving for variable 'x'.

Reorder the terms:
-160 + x + -64x + 16x2 = 160 + 64x + -16x2 + -160 + -64x + 16x2

Combine like terms: x + -64x = -63x
-160 + -63x + 16x2 = 160 + 64x + -16x2 + -160 + -64x + 16x2

Reorder the terms:
-160 + -63x + 16x2 = 160 + -160 + 64x + -64x + -16x2 + 16x2

Combine like terms: 160 + -160 = 0
-160 + -63x + 16x2 = 0 + 64x + -64x + -16x2 + 16x2
-160 + -63x + 16x2 = 64x + -64x + -16x2 + 16x2

Combine like terms: 64x + -64x = 0
-160 + -63x + 16x2 = 0 + -16x2 + 16x2
-160 + -63x + 16x2 = -16x2 + 16x2

Combine like terms: -16x2 + 16x2 = 0
-160 + -63x + 16x2 = 0

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

Divide each side by '16'.
-10 + -3.9375x + x2 = 0

Move the constant term to the right:

Add '10' to each side of the equation.
-10 + -3.9375x + 10 + x2 = 0 + 10

Reorder the terms:
-10 + 10 + -3.9375x + x2 = 0 + 10

Combine like terms: -10 + 10 = 0
0 + -3.9375x + x2 = 0 + 10
-3.9375x + x2 = 0 + 10

Combine like terms: 0 + 10 = 10
-3.9375x + x2 = 10

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 = 10 + 3.875976563

Reorder the terms:
3.875976563 + -3.9375x + x2 = 10 + 3.875976563

Combine like terms: 10 + 3.875976563 = 13.875976563
3.875976563 + -3.9375x + x2 = 13.875976563

Factor a perfect square on the left side:
(x + -1.96875)(x + -1.96875) = 13.875976563

Calculate the square root of the right side: 3.725047189

Break this problem into two subproblems by setting 
(x + -1.96875) equal to 3.725047189 and -3.725047189.

Subproblem 1

x + -1.96875 = 3.725047189 Simplifying x + -1.96875 = 3.725047189 Reorder the terms: -1.96875 + x = 3.725047189 Solving -1.96875 + x = 3.725047189 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 = 3.725047189 + 1.96875 Combine like terms: -1.96875 + 1.96875 = 0.00000 0.00000 + x = 3.725047189 + 1.96875 x = 3.725047189 + 1.96875 Combine like terms: 3.725047189 + 1.96875 = 5.693797189 x = 5.693797189 Simplifying x = 5.693797189

Subproblem 2

x + -1.96875 = -3.725047189 Simplifying x + -1.96875 = -3.725047189 Reorder the terms: -1.96875 + x = -3.725047189 Solving -1.96875 + x = -3.725047189 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 = -3.725047189 + 1.96875 Combine like terms: -1.96875 + 1.96875 = 0.00000 0.00000 + x = -3.725047189 + 1.96875 x = -3.725047189 + 1.96875 Combine like terms: -3.725047189 + 1.96875 = -1.756297189 x = -1.756297189 Simplifying x = -1.756297189

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.693797189, -1.756297189}

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