7x^2+3x-3=0

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Solution for 7x^2+3x-3=0 equation:


Simplifying
7x2 + 3x + -3 = 0

Reorder the terms:
-3 + 3x + 7x2 = 0

Solving
-3 + 3x + 7x2 = 0

Solving for variable 'x'.

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

Divide each side by '7'.
-0.4285714286 + 0.4285714286x + x2 = 0

Move the constant term to the right:

Add '0.4285714286' to each side of the equation.
-0.4285714286 + 0.4285714286x + 0.4285714286 + x2 = 0 + 0.4285714286

Reorder the terms:
-0.4285714286 + 0.4285714286 + 0.4285714286x + x2 = 0 + 0.4285714286

Combine like terms: -0.4285714286 + 0.4285714286 = 0.0000000000
0.0000000000 + 0.4285714286x + x2 = 0 + 0.4285714286
0.4285714286x + x2 = 0 + 0.4285714286

Combine like terms: 0 + 0.4285714286 = 0.4285714286
0.4285714286x + x2 = 0.4285714286

The x term is 0.4285714286x.  Take half its coefficient (0.2142857143).
Square it (0.04591836735) and add it to both sides.

Add '0.04591836735' to each side of the equation.
0.4285714286x + 0.04591836735 + x2 = 0.4285714286 + 0.04591836735

Reorder the terms:
0.04591836735 + 0.4285714286x + x2 = 0.4285714286 + 0.04591836735

Combine like terms: 0.4285714286 + 0.04591836735 = 0.47448979595
0.04591836735 + 0.4285714286x + x2 = 0.47448979595

Factor a perfect square on the left side:
(x + 0.2142857143)(x + 0.2142857143) = 0.47448979595

Calculate the square root of the right side: 0.688832197

Break this problem into two subproblems by setting 
(x + 0.2142857143) equal to 0.688832197 and -0.688832197.

Subproblem 1

x + 0.2142857143 = 0.688832197 Simplifying x + 0.2142857143 = 0.688832197 Reorder the terms: 0.2142857143 + x = 0.688832197 Solving 0.2142857143 + x = 0.688832197 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2142857143' to each side of the equation. 0.2142857143 + -0.2142857143 + x = 0.688832197 + -0.2142857143 Combine like terms: 0.2142857143 + -0.2142857143 = 0.0000000000 0.0000000000 + x = 0.688832197 + -0.2142857143 x = 0.688832197 + -0.2142857143 Combine like terms: 0.688832197 + -0.2142857143 = 0.4745464827 x = 0.4745464827 Simplifying x = 0.4745464827

Subproblem 2

x + 0.2142857143 = -0.688832197 Simplifying x + 0.2142857143 = -0.688832197 Reorder the terms: 0.2142857143 + x = -0.688832197 Solving 0.2142857143 + x = -0.688832197 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2142857143' to each side of the equation. 0.2142857143 + -0.2142857143 + x = -0.688832197 + -0.2142857143 Combine like terms: 0.2142857143 + -0.2142857143 = 0.0000000000 0.0000000000 + x = -0.688832197 + -0.2142857143 x = -0.688832197 + -0.2142857143 Combine like terms: -0.688832197 + -0.2142857143 = -0.9031179113 x = -0.9031179113 Simplifying x = -0.9031179113

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.4745464827, -0.9031179113}

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