0=-16x^2+159x-45

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Solution for 0=-16x^2+159x-45 equation:


Simplifying
0 = -16x2 + 159x + -45

Reorder the terms:
0 = -45 + 159x + -16x2

Solving
0 = -45 + 159x + -16x2

Solving for variable 'x'.

Combine like terms: 0 + 45 = 45
45 + -159x + 16x2 = -45 + 159x + -16x2 + 45 + -159x + 16x2

Reorder the terms:
45 + -159x + 16x2 = -45 + 45 + 159x + -159x + -16x2 + 16x2

Combine like terms: -45 + 45 = 0
45 + -159x + 16x2 = 0 + 159x + -159x + -16x2 + 16x2
45 + -159x + 16x2 = 159x + -159x + -16x2 + 16x2

Combine like terms: 159x + -159x = 0
45 + -159x + 16x2 = 0 + -16x2 + 16x2
45 + -159x + 16x2 = -16x2 + 16x2

Combine like terms: -16x2 + 16x2 = 0
45 + -159x + 16x2 = 0

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

Divide each side by '16'.
2.8125 + -9.9375x + x2 = 0

Move the constant term to the right:

Add '-2.8125' to each side of the equation.
2.8125 + -9.9375x + -2.8125 + x2 = 0 + -2.8125

Reorder the terms:
2.8125 + -2.8125 + -9.9375x + x2 = 0 + -2.8125

Combine like terms: 2.8125 + -2.8125 = 0.0000
0.0000 + -9.9375x + x2 = 0 + -2.8125
-9.9375x + x2 = 0 + -2.8125

Combine like terms: 0 + -2.8125 = -2.8125
-9.9375x + x2 = -2.8125

The x term is -9.9375x.  Take half its coefficient (-4.96875).
Square it (24.68847656) and add it to both sides.

Add '24.68847656' to each side of the equation.
-9.9375x + 24.68847656 + x2 = -2.8125 + 24.68847656

Reorder the terms:
24.68847656 + -9.9375x + x2 = -2.8125 + 24.68847656

Combine like terms: -2.8125 + 24.68847656 = 21.87597656
24.68847656 + -9.9375x + x2 = 21.87597656

Factor a perfect square on the left side:
(x + -4.96875)(x + -4.96875) = 21.87597656

Calculate the square root of the right side: 4.677176131

Break this problem into two subproblems by setting 
(x + -4.96875) equal to 4.677176131 and -4.677176131.

Subproblem 1

x + -4.96875 = 4.677176131 Simplifying x + -4.96875 = 4.677176131 Reorder the terms: -4.96875 + x = 4.677176131 Solving -4.96875 + x = 4.677176131 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.96875' to each side of the equation. -4.96875 + 4.96875 + x = 4.677176131 + 4.96875 Combine like terms: -4.96875 + 4.96875 = 0.00000 0.00000 + x = 4.677176131 + 4.96875 x = 4.677176131 + 4.96875 Combine like terms: 4.677176131 + 4.96875 = 9.645926131 x = 9.645926131 Simplifying x = 9.645926131

Subproblem 2

x + -4.96875 = -4.677176131 Simplifying x + -4.96875 = -4.677176131 Reorder the terms: -4.96875 + x = -4.677176131 Solving -4.96875 + x = -4.677176131 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.96875' to each side of the equation. -4.96875 + 4.96875 + x = -4.677176131 + 4.96875 Combine like terms: -4.96875 + 4.96875 = 0.00000 0.00000 + x = -4.677176131 + 4.96875 x = -4.677176131 + 4.96875 Combine like terms: -4.677176131 + 4.96875 = 0.291573869 x = 0.291573869 Simplifying x = 0.291573869

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.645926131, 0.291573869}

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