x=-16x^2+64x+960

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Solution for x=-16x^2+64x+960 equation:


Simplifying
x = -16x2 + 64x + 960

Reorder the terms:
x = 960 + 64x + -16x2

Solving
x = 960 + 64x + -16x2

Solving for variable 'x'.

Reorder the terms:
-960 + x + -64x + 16x2 = 960 + 64x + -16x2 + -960 + -64x + 16x2

Combine like terms: x + -64x = -63x
-960 + -63x + 16x2 = 960 + 64x + -16x2 + -960 + -64x + 16x2

Reorder the terms:
-960 + -63x + 16x2 = 960 + -960 + 64x + -64x + -16x2 + 16x2

Combine like terms: 960 + -960 = 0
-960 + -63x + 16x2 = 0 + 64x + -64x + -16x2 + 16x2
-960 + -63x + 16x2 = 64x + -64x + -16x2 + 16x2

Combine like terms: 64x + -64x = 0
-960 + -63x + 16x2 = 0 + -16x2 + 16x2
-960 + -63x + 16x2 = -16x2 + 16x2

Combine like terms: -16x2 + 16x2 = 0
-960 + -63x + 16x2 = 0

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

Divide each side by '16'.
-60 + -3.9375x + x2 = 0

Move the constant term to the right:

Add '60' to each side of the equation.
-60 + -3.9375x + 60 + x2 = 0 + 60

Reorder the terms:
-60 + 60 + -3.9375x + x2 = 0 + 60

Combine like terms: -60 + 60 = 0
0 + -3.9375x + x2 = 0 + 60
-3.9375x + x2 = 0 + 60

Combine like terms: 0 + 60 = 60
-3.9375x + x2 = 60

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 = 60 + 3.875976563

Reorder the terms:
3.875976563 + -3.9375x + x2 = 60 + 3.875976563

Combine like terms: 60 + 3.875976563 = 63.875976563
3.875976563 + -3.9375x + x2 = 63.875976563

Factor a perfect square on the left side:
(x + -1.96875)(x + -1.96875) = 63.875976563

Calculate the square root of the right side: 7.992244776

Break this problem into two subproblems by setting 
(x + -1.96875) equal to 7.992244776 and -7.992244776.

Subproblem 1

x + -1.96875 = 7.992244776 Simplifying x + -1.96875 = 7.992244776 Reorder the terms: -1.96875 + x = 7.992244776 Solving -1.96875 + x = 7.992244776 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 = 7.992244776 + 1.96875 Combine like terms: -1.96875 + 1.96875 = 0.00000 0.00000 + x = 7.992244776 + 1.96875 x = 7.992244776 + 1.96875 Combine like terms: 7.992244776 + 1.96875 = 9.960994776 x = 9.960994776 Simplifying x = 9.960994776

Subproblem 2

x + -1.96875 = -7.992244776 Simplifying x + -1.96875 = -7.992244776 Reorder the terms: -1.96875 + x = -7.992244776 Solving -1.96875 + x = -7.992244776 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 = -7.992244776 + 1.96875 Combine like terms: -1.96875 + 1.96875 = 0.00000 0.00000 + x = -7.992244776 + 1.96875 x = -7.992244776 + 1.96875 Combine like terms: -7.992244776 + 1.96875 = -6.023494776 x = -6.023494776 Simplifying x = -6.023494776

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.960994776, -6.023494776}

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