3x*3x+5x-17+6x+20=

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Solution for 3x*3x+5x-17+6x+20= equation:


Simplifying
3x * 3x + 5x + -17 + 6x + 20 = 0

Reorder the terms for easier multiplication:
3 * 3x * x + 5x + -17 + 6x + 20 = 0

Multiply 3 * 3
9x * x + 5x + -17 + 6x + 20 = 0

Multiply x * x
9x2 + 5x + -17 + 6x + 20 = 0

Reorder the terms:
-17 + 20 + 5x + 6x + 9x2 = 0

Combine like terms: -17 + 20 = 3
3 + 5x + 6x + 9x2 = 0

Combine like terms: 5x + 6x = 11x
3 + 11x + 9x2 = 0

Solving
3 + 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'.
0.3333333333 + 1.222222222x + x2 = 0

Move the constant term to the right:

Add '-0.3333333333' to each side of the equation.
0.3333333333 + 1.222222222x + -0.3333333333 + x2 = 0 + -0.3333333333

Reorder the terms:
0.3333333333 + -0.3333333333 + 1.222222222x + x2 = 0 + -0.3333333333

Combine like terms: 0.3333333333 + -0.3333333333 = 0.0000000000
0.0000000000 + 1.222222222x + x2 = 0 + -0.3333333333
1.222222222x + x2 = 0 + -0.3333333333

Combine like terms: 0 + -0.3333333333 = -0.3333333333
1.222222222x + x2 = -0.3333333333

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 = -0.3333333333 + 0.3734567900

Reorder the terms:
0.3734567900 + 1.222222222x + x2 = -0.3333333333 + 0.3734567900

Combine like terms: -0.3333333333 + 0.3734567900 = 0.0401234567
0.3734567900 + 1.222222222x + x2 = 0.0401234567

Factor a perfect square on the left side:
(x + 0.611111111)(x + 0.611111111) = 0.0401234567

Calculate the square root of the right side: 0.200308404

Break this problem into two subproblems by setting 
(x + 0.611111111) equal to 0.200308404 and -0.200308404.

Subproblem 1

x + 0.611111111 = 0.200308404 Simplifying x + 0.611111111 = 0.200308404 Reorder the terms: 0.611111111 + x = 0.200308404 Solving 0.611111111 + x = 0.200308404 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 = 0.200308404 + -0.611111111 Combine like terms: 0.611111111 + -0.611111111 = 0.000000000 0.000000000 + x = 0.200308404 + -0.611111111 x = 0.200308404 + -0.611111111 Combine like terms: 0.200308404 + -0.611111111 = -0.410802707 x = -0.410802707 Simplifying x = -0.410802707

Subproblem 2

x + 0.611111111 = -0.200308404 Simplifying x + 0.611111111 = -0.200308404 Reorder the terms: 0.611111111 + x = -0.200308404 Solving 0.611111111 + x = -0.200308404 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 = -0.200308404 + -0.611111111 Combine like terms: 0.611111111 + -0.611111111 = 0.000000000 0.000000000 + x = -0.200308404 + -0.611111111 x = -0.200308404 + -0.611111111 Combine like terms: -0.200308404 + -0.611111111 = -0.811419515 x = -0.811419515 Simplifying x = -0.811419515

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.410802707, -0.811419515}

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