30x^2+3x-1=0

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Solution for 30x^2+3x-1=0 equation:


Simplifying
30x2 + 3x + -1 = 0

Reorder the terms:
-1 + 3x + 30x2 = 0

Solving
-1 + 3x + 30x2 = 0

Solving for variable 'x'.

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

Divide each side by '30'.
-0.03333333333 + 0.1x + x2 = 0

Move the constant term to the right:

Add '0.03333333333' to each side of the equation.
-0.03333333333 + 0.1x + 0.03333333333 + x2 = 0 + 0.03333333333

Reorder the terms:
-0.03333333333 + 0.03333333333 + 0.1x + x2 = 0 + 0.03333333333

Combine like terms: -0.03333333333 + 0.03333333333 = 0.00000000000
0.00000000000 + 0.1x + x2 = 0 + 0.03333333333
0.1x + x2 = 0 + 0.03333333333

Combine like terms: 0 + 0.03333333333 = 0.03333333333
0.1x + x2 = 0.03333333333

The x term is 0.1x.  Take half its coefficient (0.05).
Square it (0.0025) and add it to both sides.

Add '0.0025' to each side of the equation.
0.1x + 0.0025 + x2 = 0.03333333333 + 0.0025

Reorder the terms:
0.0025 + 0.1x + x2 = 0.03333333333 + 0.0025

Combine like terms: 0.03333333333 + 0.0025 = 0.03583333333
0.0025 + 0.1x + x2 = 0.03583333333

Factor a perfect square on the left side:
(x + 0.05)(x + 0.05) = 0.03583333333

Calculate the square root of the right side: 0.189296945

Break this problem into two subproblems by setting 
(x + 0.05) equal to 0.189296945 and -0.189296945.

Subproblem 1

x + 0.05 = 0.189296945 Simplifying x + 0.05 = 0.189296945 Reorder the terms: 0.05 + x = 0.189296945 Solving 0.05 + x = 0.189296945 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.05' to each side of the equation. 0.05 + -0.05 + x = 0.189296945 + -0.05 Combine like terms: 0.05 + -0.05 = 0.00 0.00 + x = 0.189296945 + -0.05 x = 0.189296945 + -0.05 Combine like terms: 0.189296945 + -0.05 = 0.139296945 x = 0.139296945 Simplifying x = 0.139296945

Subproblem 2

x + 0.05 = -0.189296945 Simplifying x + 0.05 = -0.189296945 Reorder the terms: 0.05 + x = -0.189296945 Solving 0.05 + x = -0.189296945 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.05' to each side of the equation. 0.05 + -0.05 + x = -0.189296945 + -0.05 Combine like terms: 0.05 + -0.05 = 0.00 0.00 + x = -0.189296945 + -0.05 x = -0.189296945 + -0.05 Combine like terms: -0.189296945 + -0.05 = -0.239296945 x = -0.239296945 Simplifying x = -0.239296945

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.139296945, -0.239296945}

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