9=-16x^2+160x

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Solution for 9=-16x^2+160x equation:


Simplifying
9 = -16x2 + 160x

Reorder the terms:
9 = 160x + -16x2

Solving
9 = 160x + -16x2

Solving for variable 'x'.

Reorder the terms:
9 + -160x + 16x2 = 160x + -160x + -16x2 + 16x2

Combine like terms: 160x + -160x = 0
9 + -160x + 16x2 = 0 + -16x2 + 16x2
9 + -160x + 16x2 = -16x2 + 16x2

Combine like terms: -16x2 + 16x2 = 0
9 + -160x + 16x2 = 0

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

Divide each side by '16'.
0.5625 + -10x + x2 = 0

Move the constant term to the right:

Add '-0.5625' to each side of the equation.
0.5625 + -10x + -0.5625 + x2 = 0 + -0.5625

Reorder the terms:
0.5625 + -0.5625 + -10x + x2 = 0 + -0.5625

Combine like terms: 0.5625 + -0.5625 = 0.0000
0.0000 + -10x + x2 = 0 + -0.5625
-10x + x2 = 0 + -0.5625

Combine like terms: 0 + -0.5625 = -0.5625
-10x + x2 = -0.5625

The x term is -10x.  Take half its coefficient (-5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
-10x + 25 + x2 = -0.5625 + 25

Reorder the terms:
25 + -10x + x2 = -0.5625 + 25

Combine like terms: -0.5625 + 25 = 24.4375
25 + -10x + x2 = 24.4375

Factor a perfect square on the left side:
(x + -5)(x + -5) = 24.4375

Calculate the square root of the right side: 4.943429983

Break this problem into two subproblems by setting 
(x + -5) equal to 4.943429983 and -4.943429983.

Subproblem 1

x + -5 = 4.943429983 Simplifying x + -5 = 4.943429983 Reorder the terms: -5 + x = 4.943429983 Solving -5 + x = 4.943429983 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + x = 4.943429983 + 5 Combine like terms: -5 + 5 = 0 0 + x = 4.943429983 + 5 x = 4.943429983 + 5 Combine like terms: 4.943429983 + 5 = 9.943429983 x = 9.943429983 Simplifying x = 9.943429983

Subproblem 2

x + -5 = -4.943429983 Simplifying x + -5 = -4.943429983 Reorder the terms: -5 + x = -4.943429983 Solving -5 + x = -4.943429983 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + x = -4.943429983 + 5 Combine like terms: -5 + 5 = 0 0 + x = -4.943429983 + 5 x = -4.943429983 + 5 Combine like terms: -4.943429983 + 5 = 0.056570017 x = 0.056570017 Simplifying x = 0.056570017

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.943429983, 0.056570017}

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