.0002x^2-.316x+127.9=5

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Solution for .0002x^2-.316x+127.9=5 equation:


Simplifying
0.0002x2 + -0.316x + 127.9 = 5

Reorder the terms:
127.9 + -0.316x + 0.0002x2 = 5

Solving
127.9 + -0.316x + 0.0002x2 = 5

Solving for variable 'x'.

Reorder the terms:
127.9 + -5 + -0.316x + 0.0002x2 = 5 + -5

Combine like terms: 127.9 + -5 = 122.9
122.9 + -0.316x + 0.0002x2 = 5 + -5

Combine like terms: 5 + -5 = 0
122.9 + -0.316x + 0.0002x2 = 0

Begin completing the square.  Divide all terms by
0.0002 the coefficient of the squared term: 

Divide each side by '0.0002'.
614500 + -1580x + x2 = 0

Move the constant term to the right:

Add '-614500' to each side of the equation.
614500 + -1580x + -614500 + x2 = 0 + -614500

Reorder the terms:
614500 + -614500 + -1580x + x2 = 0 + -614500

Combine like terms: 614500 + -614500 = 0
0 + -1580x + x2 = 0 + -614500
-1580x + x2 = 0 + -614500

Combine like terms: 0 + -614500 = -614500
-1580x + x2 = -614500

The x term is -1580x.  Take half its coefficient (-790).
Square it (624100) and add it to both sides.

Add '624100' to each side of the equation.
-1580x + 624100 + x2 = -614500 + 624100

Reorder the terms:
624100 + -1580x + x2 = -614500 + 624100

Combine like terms: -614500 + 624100 = 9600
624100 + -1580x + x2 = 9600

Factor a perfect square on the left side:
(x + -790)(x + -790) = 9600

Calculate the square root of the right side: 97.979589711

Break this problem into two subproblems by setting 
(x + -790) equal to 97.979589711 and -97.979589711.

Subproblem 1

x + -790 = 97.979589711 Simplifying x + -790 = 97.979589711 Reorder the terms: -790 + x = 97.979589711 Solving -790 + x = 97.979589711 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '790' to each side of the equation. -790 + 790 + x = 97.979589711 + 790 Combine like terms: -790 + 790 = 0 0 + x = 97.979589711 + 790 x = 97.979589711 + 790 Combine like terms: 97.979589711 + 790 = 887.979589711 x = 887.979589711 Simplifying x = 887.979589711

Subproblem 2

x + -790 = -97.979589711 Simplifying x + -790 = -97.979589711 Reorder the terms: -790 + x = -97.979589711 Solving -790 + x = -97.979589711 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '790' to each side of the equation. -790 + 790 + x = -97.979589711 + 790 Combine like terms: -790 + 790 = 0 0 + x = -97.979589711 + 790 x = -97.979589711 + 790 Combine like terms: -97.979589711 + 790 = 692.020410289 x = 692.020410289 Simplifying x = 692.020410289

Solution

The solution to the problem is based on the solutions from the subproblems. x = {887.979589711, 692.020410289}

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