3x*3x+11x-4=0

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Solution for 3x*3x+11x-4=0 equation:


Simplifying
3x * 3x + 11x + -4 = 0

Reorder the terms for easier multiplication:
3 * 3x * x + 11x + -4 = 0

Multiply 3 * 3
9x * x + 11x + -4 = 0

Multiply x * x
9x2 + 11x + -4 = 0

Reorder the terms:
-4 + 11x + 9x2 = 0

Solving
-4 + 11x + 9x2 = 0

Solving for variable 'x'.

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

Divide each side by '9'.
-0.4444444444 + 1.222222222x + x2 = 0

Move the constant term to the right:

Add '0.4444444444' to each side of the equation.
-0.4444444444 + 1.222222222x + 0.4444444444 + x2 = 0 + 0.4444444444

Reorder the terms:
-0.4444444444 + 0.4444444444 + 1.222222222x + x2 = 0 + 0.4444444444

Combine like terms: -0.4444444444 + 0.4444444444 = 0.0000000000
0.0000000000 + 1.222222222x + x2 = 0 + 0.4444444444
1.222222222x + x2 = 0 + 0.4444444444

Combine like terms: 0 + 0.4444444444 = 0.4444444444
1.222222222x + x2 = 0.4444444444

The x term is 1.222222222x.  Take half its coefficient (0.611111111).
Square it (0.3734567900) and add it to both sides.

Add '0.3734567900' to each side of the equation.
1.222222222x + 0.3734567900 + x2 = 0.4444444444 + 0.3734567900

Reorder the terms:
0.3734567900 + 1.222222222x + x2 = 0.4444444444 + 0.3734567900

Combine like terms: 0.4444444444 + 0.3734567900 = 0.8179012344
0.3734567900 + 1.222222222x + x2 = 0.8179012344

Factor a perfect square on the left side:
(x + 0.611111111)(x + 0.611111111) = 0.8179012344

Calculate the square root of the right side: 0.904378922

Break this problem into two subproblems by setting 
(x + 0.611111111) equal to 0.904378922 and -0.904378922.

Subproblem 1

x + 0.611111111 = 0.904378922 Simplifying x + 0.611111111 = 0.904378922 Reorder the terms: 0.611111111 + x = 0.904378922 Solving 0.611111111 + x = 0.904378922 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.611111111' to each side of the equation. 0.611111111 + -0.611111111 + x = 0.904378922 + -0.611111111 Combine like terms: 0.611111111 + -0.611111111 = 0.000000000 0.000000000 + x = 0.904378922 + -0.611111111 x = 0.904378922 + -0.611111111 Combine like terms: 0.904378922 + -0.611111111 = 0.293267811 x = 0.293267811 Simplifying x = 0.293267811

Subproblem 2

x + 0.611111111 = -0.904378922 Simplifying x + 0.611111111 = -0.904378922 Reorder the terms: 0.611111111 + x = -0.904378922 Solving 0.611111111 + x = -0.904378922 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.611111111' to each side of the equation. 0.611111111 + -0.611111111 + x = -0.904378922 + -0.611111111 Combine like terms: 0.611111111 + -0.611111111 = 0.000000000 0.000000000 + x = -0.904378922 + -0.611111111 x = -0.904378922 + -0.611111111 Combine like terms: -0.904378922 + -0.611111111 = -1.515490033 x = -1.515490033 Simplifying x = -1.515490033

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.293267811, -1.515490033}

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