10000x^2+1.2x-0.3=0

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Solution for 10000x^2+1.2x-0.3=0 equation:


Simplifying
10000x2 + 1.2x + -0.3 = 0

Reorder the terms:
-0.3 + 1.2x + 10000x2 = 0

Solving
-0.3 + 1.2x + 10000x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
10000 the coefficient of the squared term: 

Divide each side by '10000'.
-0.00003 + 0.00012x + x2 = 0

Move the constant term to the right:

Add '0.00003' to each side of the equation.
-0.00003 + 0.00012x + 0.00003 + x2 = 0 + 0.00003

Reorder the terms:
-0.00003 + 0.00003 + 0.00012x + x2 = 0 + 0.00003

Combine like terms: -0.00003 + 0.00003 = 0.00000
0.00000 + 0.00012x + x2 = 0 + 0.00003
0.00012x + x2 = 0 + 0.00003

Combine like terms: 0 + 0.00003 = 0.00003
0.00012x + x2 = 0.00003

The x term is 0.00012x.  Take half its coefficient (0.00006).
Square it (0.0000000036) and add it to both sides.

Add '0.0000000036' to each side of the equation.
0.00012x + 0.0000000036 + x2 = 0.00003 + 0.0000000036

Reorder the terms:
0.0000000036 + 0.00012x + x2 = 0.00003 + 0.0000000036

Combine like terms: 0.00003 + 0.0000000036 = 0.0000300036
0.0000000036 + 0.00012x + x2 = 0.0000300036

Factor a perfect square on the left side:
(x + 0.00006)(x + 0.00006) = 0.0000300036

Calculate the square root of the right side: 0.005477554

Break this problem into two subproblems by setting 
(x + 0.00006) equal to 0.005477554 and -0.005477554.

Subproblem 1

x + 0.00006 = 0.005477554 Simplifying x + 0.00006 = 0.005477554 Reorder the terms: 0.00006 + x = 0.005477554 Solving 0.00006 + x = 0.005477554 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.00006' to each side of the equation. 0.00006 + -0.00006 + x = 0.005477554 + -0.00006 Combine like terms: 0.00006 + -0.00006 = 0.00000 0.00000 + x = 0.005477554 + -0.00006 x = 0.005477554 + -0.00006 Combine like terms: 0.005477554 + -0.00006 = 0.005417554 x = 0.005417554 Simplifying x = 0.005417554

Subproblem 2

x + 0.00006 = -0.005477554 Simplifying x + 0.00006 = -0.005477554 Reorder the terms: 0.00006 + x = -0.005477554 Solving 0.00006 + x = -0.005477554 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.00006' to each side of the equation. 0.00006 + -0.00006 + x = -0.005477554 + -0.00006 Combine like terms: 0.00006 + -0.00006 = 0.00000 0.00000 + x = -0.005477554 + -0.00006 x = -0.005477554 + -0.00006 Combine like terms: -0.005477554 + -0.00006 = -0.005537554 x = -0.005537554 Simplifying x = -0.005537554

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.005417554, -0.005537554}

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