20x^2+3x-3=0

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Solution for 20x^2+3x-3=0 equation:


Simplifying
20x2 + 3x + -3 = 0

Reorder the terms:
-3 + 3x + 20x2 = 0

Solving
-3 + 3x + 20x2 = 0

Solving for variable 'x'.

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

Divide each side by '20'.
-0.15 + 0.15x + x2 = 0

Move the constant term to the right:

Add '0.15' to each side of the equation.
-0.15 + 0.15x + 0.15 + x2 = 0 + 0.15

Reorder the terms:
-0.15 + 0.15 + 0.15x + x2 = 0 + 0.15

Combine like terms: -0.15 + 0.15 = 0.00
0.00 + 0.15x + x2 = 0 + 0.15
0.15x + x2 = 0 + 0.15

Combine like terms: 0 + 0.15 = 0.15
0.15x + x2 = 0.15

The x term is 0.15x.  Take half its coefficient (0.075).
Square it (0.005625) and add it to both sides.

Add '0.005625' to each side of the equation.
0.15x + 0.005625 + x2 = 0.15 + 0.005625

Reorder the terms:
0.005625 + 0.15x + x2 = 0.15 + 0.005625

Combine like terms: 0.15 + 0.005625 = 0.155625
0.005625 + 0.15x + x2 = 0.155625

Factor a perfect square on the left side:
(x + 0.075)(x + 0.075) = 0.155625

Calculate the square root of the right side: 0.394493346

Break this problem into two subproblems by setting 
(x + 0.075) equal to 0.394493346 and -0.394493346.

Subproblem 1

x + 0.075 = 0.394493346 Simplifying x + 0.075 = 0.394493346 Reorder the terms: 0.075 + x = 0.394493346 Solving 0.075 + x = 0.394493346 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.075' to each side of the equation. 0.075 + -0.075 + x = 0.394493346 + -0.075 Combine like terms: 0.075 + -0.075 = 0.000 0.000 + x = 0.394493346 + -0.075 x = 0.394493346 + -0.075 Combine like terms: 0.394493346 + -0.075 = 0.319493346 x = 0.319493346 Simplifying x = 0.319493346

Subproblem 2

x + 0.075 = -0.394493346 Simplifying x + 0.075 = -0.394493346 Reorder the terms: 0.075 + x = -0.394493346 Solving 0.075 + x = -0.394493346 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.075' to each side of the equation. 0.075 + -0.075 + x = -0.394493346 + -0.075 Combine like terms: 0.075 + -0.075 = 0.000 0.000 + x = -0.394493346 + -0.075 x = -0.394493346 + -0.075 Combine like terms: -0.394493346 + -0.075 = -0.469493346 x = -0.469493346 Simplifying x = -0.469493346

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.319493346, -0.469493346}

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