0=.0001x^2+4x-3

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Solution for 0=.0001x^2+4x-3 equation:


Simplifying
0 = 0.0001x2 + 4x + -3

Reorder the terms:
0 = -3 + 4x + 0.0001x2

Solving
0 = -3 + 4x + 0.0001x2

Solving for variable 'x'.

Combine like terms: 0 + 3 = 3
3 + -4x + -0.0001x2 = -3 + 4x + 0.0001x2 + 3 + -4x + -0.0001x2

Reorder the terms:
3 + -4x + -0.0001x2 = -3 + 3 + 4x + -4x + 0.0001x2 + -0.0001x2

Combine like terms: -3 + 3 = 0
3 + -4x + -0.0001x2 = 0 + 4x + -4x + 0.0001x2 + -0.0001x2
3 + -4x + -0.0001x2 = 4x + -4x + 0.0001x2 + -0.0001x2

Combine like terms: 4x + -4x = 0
3 + -4x + -0.0001x2 = 0 + 0.0001x2 + -0.0001x2
3 + -4x + -0.0001x2 = 0.0001x2 + -0.0001x2

Combine like terms: 0.0001x2 + -0.0001x2 = 0.0000
3 + -4x + -0.0001x2 = 0.0000

Begin completing the square.  Divide all terms by
-0.0001 the coefficient of the squared term: 

Divide each side by '-0.0001'.
-30000 + 40000x + x2 = 0

Move the constant term to the right:

Add '30000' to each side of the equation.
-30000 + 40000x + 30000 + x2 = 0 + 30000

Reorder the terms:
-30000 + 30000 + 40000x + x2 = 0 + 30000

Combine like terms: -30000 + 30000 = 0
0 + 40000x + x2 = 0 + 30000
40000x + x2 = 0 + 30000

Combine like terms: 0 + 30000 = 30000
40000x + x2 = 30000

The x term is 40000x.  Take half its coefficient (20000).
Square it (400000000) and add it to both sides.

Add '400000000' to each side of the equation.
40000x + 400000000 + x2 = 30000 + 400000000

Reorder the terms:
400000000 + 40000x + x2 = 30000 + 400000000

Combine like terms: 30000 + 400000000 = 400030000
400000000 + 40000x + x2 = 400030000

Factor a perfect square on the left side:
(x + 20000)(x + 20000) = 400030000

Calculate the square root of the right side: 20000.749985938

Break this problem into two subproblems by setting 
(x + 20000) equal to 20000.749985938 and -20000.749985938.

Subproblem 1

x + 20000 = 20000.749985938 Simplifying x + 20000 = 20000.749985938 Reorder the terms: 20000 + x = 20000.749985938 Solving 20000 + x = 20000.749985938 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-20000' to each side of the equation. 20000 + -20000 + x = 20000.749985938 + -20000 Combine like terms: 20000 + -20000 = 0 0 + x = 20000.749985938 + -20000 x = 20000.749985938 + -20000 Combine like terms: 20000.749985938 + -20000 = 0.749985938 x = 0.749985938 Simplifying x = 0.749985938

Subproblem 2

x + 20000 = -20000.749985938 Simplifying x + 20000 = -20000.749985938 Reorder the terms: 20000 + x = -20000.749985938 Solving 20000 + x = -20000.749985938 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-20000' to each side of the equation. 20000 + -20000 + x = -20000.749985938 + -20000 Combine like terms: 20000 + -20000 = 0 0 + x = -20000.749985938 + -20000 x = -20000.749985938 + -20000 Combine like terms: -20000.749985938 + -20000 = -40000.749985938 x = -40000.749985938 Simplifying x = -40000.749985938

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.749985938, -40000.749985938}

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