9x^2+37x-4=0

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Solution for 9x^2+37x-4=0 equation:


Simplifying
9x2 + 37x + -4 = 0

Reorder the terms:
-4 + 37x + 9x2 = 0

Solving
-4 + 37x + 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 + 4.111111111x + x2 = 0

Move the constant term to the right:

Add '0.4444444444' to each side of the equation.
-0.4444444444 + 4.111111111x + 0.4444444444 + x2 = 0 + 0.4444444444

Reorder the terms:
-0.4444444444 + 0.4444444444 + 4.111111111x + x2 = 0 + 0.4444444444

Combine like terms: -0.4444444444 + 0.4444444444 = 0.0000000000
0.0000000000 + 4.111111111x + x2 = 0 + 0.4444444444
4.111111111x + x2 = 0 + 0.4444444444

Combine like terms: 0 + 0.4444444444 = 0.4444444444
4.111111111x + x2 = 0.4444444444

The x term is 4.111111111x.  Take half its coefficient (2.055555556).
Square it (4.225308644) and add it to both sides.

Add '4.225308644' to each side of the equation.
4.111111111x + 4.225308644 + x2 = 0.4444444444 + 4.225308644

Reorder the terms:
4.225308644 + 4.111111111x + x2 = 0.4444444444 + 4.225308644

Combine like terms: 0.4444444444 + 4.225308644 = 4.6697530884
4.225308644 + 4.111111111x + x2 = 4.6697530884

Factor a perfect square on the left side:
(x + 2.055555556)(x + 2.055555556) = 4.6697530884

Calculate the square root of the right side: 2.160961149

Break this problem into two subproblems by setting 
(x + 2.055555556) equal to 2.160961149 and -2.160961149.

Subproblem 1

x + 2.055555556 = 2.160961149 Simplifying x + 2.055555556 = 2.160961149 Reorder the terms: 2.055555556 + x = 2.160961149 Solving 2.055555556 + x = 2.160961149 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.055555556' to each side of the equation. 2.055555556 + -2.055555556 + x = 2.160961149 + -2.055555556 Combine like terms: 2.055555556 + -2.055555556 = 0.000000000 0.000000000 + x = 2.160961149 + -2.055555556 x = 2.160961149 + -2.055555556 Combine like terms: 2.160961149 + -2.055555556 = 0.105405593 x = 0.105405593 Simplifying x = 0.105405593

Subproblem 2

x + 2.055555556 = -2.160961149 Simplifying x + 2.055555556 = -2.160961149 Reorder the terms: 2.055555556 + x = -2.160961149 Solving 2.055555556 + x = -2.160961149 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.055555556' to each side of the equation. 2.055555556 + -2.055555556 + x = -2.160961149 + -2.055555556 Combine like terms: 2.055555556 + -2.055555556 = 0.000000000 0.000000000 + x = -2.160961149 + -2.055555556 x = -2.160961149 + -2.055555556 Combine like terms: -2.160961149 + -2.055555556 = -4.216516705 x = -4.216516705 Simplifying x = -4.216516705

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.105405593, -4.216516705}

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