1995=-143.3x^2+1823.3x+6820

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Solution for 1995=-143.3x^2+1823.3x+6820 equation:


Simplifying
1995 = -143.3x2 + 1823.3x + 6820

Reorder the terms:
1995 = 6820 + 1823.3x + -143.3x2

Solving
1995 = 6820 + 1823.3x + -143.3x2

Solving for variable 'x'.

Combine like terms: 1995 + -6820 = -4825
-4825 + -1823.3x + 143.3x2 = 6820 + 1823.3x + -143.3x2 + -6820 + -1823.3x + 143.3x2

Reorder the terms:
-4825 + -1823.3x + 143.3x2 = 6820 + -6820 + 1823.3x + -1823.3x + -143.3x2 + 143.3x2

Combine like terms: 6820 + -6820 = 0
-4825 + -1823.3x + 143.3x2 = 0 + 1823.3x + -1823.3x + -143.3x2 + 143.3x2
-4825 + -1823.3x + 143.3x2 = 1823.3x + -1823.3x + -143.3x2 + 143.3x2

Combine like terms: 1823.3x + -1823.3x = 0.0
-4825 + -1823.3x + 143.3x2 = 0.0 + -143.3x2 + 143.3x2
-4825 + -1823.3x + 143.3x2 = -143.3x2 + 143.3x2

Combine like terms: -143.3x2 + 143.3x2 = 0.0
-4825 + -1823.3x + 143.3x2 = 0.0

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

Divide each side by '143.3'.
-33.67062107 + -12.72365666x + x2 = 0

Move the constant term to the right:

Add '33.67062107' to each side of the equation.
-33.67062107 + -12.72365666x + 33.67062107 + x2 = 0 + 33.67062107

Reorder the terms:
-33.67062107 + 33.67062107 + -12.72365666x + x2 = 0 + 33.67062107

Combine like terms: -33.67062107 + 33.67062107 = 0.00000000
0.00000000 + -12.72365666x + x2 = 0 + 33.67062107
-12.72365666x + x2 = 0 + 33.67062107

Combine like terms: 0 + 33.67062107 = 33.67062107
-12.72365666x + x2 = 33.67062107

The x term is -12.72365666x.  Take half its coefficient (-6.36182833).
Square it (40.47285970) and add it to both sides.

Add '40.47285970' to each side of the equation.
-12.72365666x + 40.47285970 + x2 = 33.67062107 + 40.47285970

Reorder the terms:
40.47285970 + -12.72365666x + x2 = 33.67062107 + 40.47285970

Combine like terms: 33.67062107 + 40.47285970 = 74.14348077
40.47285970 + -12.72365666x + x2 = 74.14348077

Factor a perfect square on the left side:
(x + -6.36182833)(x + -6.36182833) = 74.14348077

Calculate the square root of the right side: 8.610660879

Break this problem into two subproblems by setting 
(x + -6.36182833) equal to 8.610660879 and -8.610660879.

Subproblem 1

x + -6.36182833 = 8.610660879 Simplifying x + -6.36182833 = 8.610660879 Reorder the terms: -6.36182833 + x = 8.610660879 Solving -6.36182833 + x = 8.610660879 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6.36182833' to each side of the equation. -6.36182833 + 6.36182833 + x = 8.610660879 + 6.36182833 Combine like terms: -6.36182833 + 6.36182833 = 0.00000000 0.00000000 + x = 8.610660879 + 6.36182833 x = 8.610660879 + 6.36182833 Combine like terms: 8.610660879 + 6.36182833 = 14.972489209 x = 14.972489209 Simplifying x = 14.972489209

Subproblem 2

x + -6.36182833 = -8.610660879 Simplifying x + -6.36182833 = -8.610660879 Reorder the terms: -6.36182833 + x = -8.610660879 Solving -6.36182833 + x = -8.610660879 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6.36182833' to each side of the equation. -6.36182833 + 6.36182833 + x = -8.610660879 + 6.36182833 Combine like terms: -6.36182833 + 6.36182833 = 0.00000000 0.00000000 + x = -8.610660879 + 6.36182833 x = -8.610660879 + 6.36182833 Combine like terms: -8.610660879 + 6.36182833 = -2.248832549 x = -2.248832549 Simplifying x = -2.248832549

Solution

The solution to the problem is based on the solutions from the subproblems. x = {14.972489209, -2.248832549}

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