9x^2+23x+4=0

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Solution for 9x^2+23x+4=0 equation:


Simplifying
9x2 + 23x + 4 = 0

Reorder the terms:
4 + 23x + 9x2 = 0

Solving
4 + 23x + 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 + 2.555555556x + x2 = 0

Move the constant term to the right:

Add '-0.4444444444' to each side of the equation.
0.4444444444 + 2.555555556x + -0.4444444444 + x2 = 0 + -0.4444444444

Reorder the terms:
0.4444444444 + -0.4444444444 + 2.555555556x + x2 = 0 + -0.4444444444

Combine like terms: 0.4444444444 + -0.4444444444 = 0.0000000000
0.0000000000 + 2.555555556x + x2 = 0 + -0.4444444444
2.555555556x + x2 = 0 + -0.4444444444

Combine like terms: 0 + -0.4444444444 = -0.4444444444
2.555555556x + x2 = -0.4444444444

The x term is 2.555555556x.  Take half its coefficient (1.277777778).
Square it (1.632716050) and add it to both sides.

Add '1.632716050' to each side of the equation.
2.555555556x + 1.632716050 + x2 = -0.4444444444 + 1.632716050

Reorder the terms:
1.632716050 + 2.555555556x + x2 = -0.4444444444 + 1.632716050

Combine like terms: -0.4444444444 + 1.632716050 = 1.1882716056
1.632716050 + 2.555555556x + x2 = 1.1882716056

Factor a perfect square on the left side:
(x + 1.277777778)(x + 1.277777778) = 1.1882716056

Calculate the square root of the right side: 1.090078715

Break this problem into two subproblems by setting 
(x + 1.277777778) equal to 1.090078715 and -1.090078715.

Subproblem 1

x + 1.277777778 = 1.090078715 Simplifying x + 1.277777778 = 1.090078715 Reorder the terms: 1.277777778 + x = 1.090078715 Solving 1.277777778 + x = 1.090078715 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.277777778' to each side of the equation. 1.277777778 + -1.277777778 + x = 1.090078715 + -1.277777778 Combine like terms: 1.277777778 + -1.277777778 = 0.000000000 0.000000000 + x = 1.090078715 + -1.277777778 x = 1.090078715 + -1.277777778 Combine like terms: 1.090078715 + -1.277777778 = -0.187699063 x = -0.187699063 Simplifying x = -0.187699063

Subproblem 2

x + 1.277777778 = -1.090078715 Simplifying x + 1.277777778 = -1.090078715 Reorder the terms: 1.277777778 + x = -1.090078715 Solving 1.277777778 + x = -1.090078715 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.277777778' to each side of the equation. 1.277777778 + -1.277777778 + x = -1.090078715 + -1.277777778 Combine like terms: 1.277777778 + -1.277777778 = 0.000000000 0.000000000 + x = -1.090078715 + -1.277777778 x = -1.090078715 + -1.277777778 Combine like terms: -1.090078715 + -1.277777778 = -2.367856493 x = -2.367856493 Simplifying x = -2.367856493

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.187699063, -2.367856493}

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