10000000x^2+1.2x-.3=0

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Solution for 10000000x^2+1.2x-.3=0 equation:


Simplifying
10000000x2 + 1.2x + -0.3 = 0

Reorder the terms:
-0.3 + 1.2x + 10000000x2 = 0

Solving
-0.3 + 1.2x + 10000000x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
10000000 the coefficient of the squared term: 

Divide each side by '10000000'.
-0.00000003 + 0.00000012x + x2 = 0

Move the constant term to the right:

Add '0.00000003' to each side of the equation.
-0.00000003 + 0.00000012x + 0.00000003 + x2 = 0 + 0.00000003

Reorder the terms:
-0.00000003 + 0.00000003 + 0.00000012x + x2 = 0 + 0.00000003

Combine like terms: -0.00000003 + 0.00000003 = 0.00000000
0.00000000 + 0.00000012x + x2 = 0 + 0.00000003
0.00000012x + x2 = 0 + 0.00000003

Combine like terms: 0 + 0.00000003 = 0.00000003
0.00000012x + x2 = 0.00000003

The x term is 0.00000012x.  Take half its coefficient (0.00000006).
Square it (0.0000000000000036) and add it to both sides.

Add '0.0000000000000036' to each side of the equation.
0.00000012x + 0.0000000000000036 + x2 = 0.00000003 + 0.0000000000000036

Reorder the terms:
0.0000000000000036 + 0.00000012x + x2 = 0.00000003 + 0.0000000000000036

Combine like terms: 0.00000003 + 0.0000000000000036 = 0.0000000300000036
0.0000000000000036 + 0.00000012x + x2 = 0.0000000300000036

Factor a perfect square on the left side:
(x + 0.00000006)(x + 0.00000006) = 0.0000000300000036

Calculate the square root of the right side: 0.000173205

Break this problem into two subproblems by setting 
(x + 0.00000006) equal to 0.000173205 and -0.000173205.

Subproblem 1

x + 0.00000006 = 0.000173205 Simplifying x + 0.00000006 = 0.000173205 Reorder the terms: 0.00000006 + x = 0.000173205 Solving 0.00000006 + x = 0.000173205 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.00000006' to each side of the equation. 0.00000006 + -0.00000006 + x = 0.000173205 + -0.00000006 Combine like terms: 0.00000006 + -0.00000006 = 0.00000000 0.00000000 + x = 0.000173205 + -0.00000006 x = 0.000173205 + -0.00000006 Combine like terms: 0.000173205 + -0.00000006 = 0.000173145 x = 0.000173145 Simplifying x = 0.000173145

Subproblem 2

x + 0.00000006 = -0.000173205 Simplifying x + 0.00000006 = -0.000173205 Reorder the terms: 0.00000006 + x = -0.000173205 Solving 0.00000006 + x = -0.000173205 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.00000006' to each side of the equation. 0.00000006 + -0.00000006 + x = -0.000173205 + -0.00000006 Combine like terms: 0.00000006 + -0.00000006 = 0.00000000 0.00000000 + x = -0.000173205 + -0.00000006 x = -0.000173205 + -0.00000006 Combine like terms: -0.000173205 + -0.00000006 = -0.000173265 x = -0.000173265 Simplifying x = -0.000173265

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.000173145, -0.000173265}

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