9x^2+29x-12=0

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Solution for 9x^2+29x-12=0 equation:


Simplifying
9x2 + 29x + -12 = 0

Reorder the terms:
-12 + 29x + 9x2 = 0

Solving
-12 + 29x + 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'.
-1.333333333 + 3.222222222x + x2 = 0

Move the constant term to the right:

Add '1.333333333' to each side of the equation.
-1.333333333 + 3.222222222x + 1.333333333 + x2 = 0 + 1.333333333

Reorder the terms:
-1.333333333 + 1.333333333 + 3.222222222x + x2 = 0 + 1.333333333

Combine like terms: -1.333333333 + 1.333333333 = 0.000000000
0.000000000 + 3.222222222x + x2 = 0 + 1.333333333
3.222222222x + x2 = 0 + 1.333333333

Combine like terms: 0 + 1.333333333 = 1.333333333
3.222222222x + x2 = 1.333333333

The x term is 3.222222222x.  Take half its coefficient (1.611111111).
Square it (2.595679012) and add it to both sides.

Add '2.595679012' to each side of the equation.
3.222222222x + 2.595679012 + x2 = 1.333333333 + 2.595679012

Reorder the terms:
2.595679012 + 3.222222222x + x2 = 1.333333333 + 2.595679012

Combine like terms: 1.333333333 + 2.595679012 = 3.929012345
2.595679012 + 3.222222222x + x2 = 3.929012345

Factor a perfect square on the left side:
(x + 1.611111111)(x + 1.611111111) = 3.929012345

Calculate the square root of the right side: 1.982173641

Break this problem into two subproblems by setting 
(x + 1.611111111) equal to 1.982173641 and -1.982173641.

Subproblem 1

x + 1.611111111 = 1.982173641 Simplifying x + 1.611111111 = 1.982173641 Reorder the terms: 1.611111111 + x = 1.982173641 Solving 1.611111111 + x = 1.982173641 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.611111111' to each side of the equation. 1.611111111 + -1.611111111 + x = 1.982173641 + -1.611111111 Combine like terms: 1.611111111 + -1.611111111 = 0.000000000 0.000000000 + x = 1.982173641 + -1.611111111 x = 1.982173641 + -1.611111111 Combine like terms: 1.982173641 + -1.611111111 = 0.37106253 x = 0.37106253 Simplifying x = 0.37106253

Subproblem 2

x + 1.611111111 = -1.982173641 Simplifying x + 1.611111111 = -1.982173641 Reorder the terms: 1.611111111 + x = -1.982173641 Solving 1.611111111 + x = -1.982173641 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.611111111' to each side of the equation. 1.611111111 + -1.611111111 + x = -1.982173641 + -1.611111111 Combine like terms: 1.611111111 + -1.611111111 = 0.000000000 0.000000000 + x = -1.982173641 + -1.611111111 x = -1.982173641 + -1.611111111 Combine like terms: -1.982173641 + -1.611111111 = -3.593284752 x = -3.593284752 Simplifying x = -3.593284752

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.37106253, -3.593284752}

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