9x^2=-22x-12

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Solution for 9x^2=-22x-12 equation:


Simplifying
9x2 = -22x + -12

Reorder the terms:
9x2 = -12 + -22x

Solving
9x2 = -12 + -22x

Solving for variable 'x'.

Reorder the terms:
12 + 22x + 9x2 = -12 + -22x + 12 + 22x

Reorder the terms:
12 + 22x + 9x2 = -12 + 12 + -22x + 22x

Combine like terms: -12 + 12 = 0
12 + 22x + 9x2 = 0 + -22x + 22x
12 + 22x + 9x2 = -22x + 22x

Combine like terms: -22x + 22x = 0
12 + 22x + 9x2 = 0

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

Divide each side by '9'.
1.333333333 + 2.444444444x + x2 = 0

Move the constant term to the right:

Add '-1.333333333' to each side of the equation.
1.333333333 + 2.444444444x + -1.333333333 + x2 = 0 + -1.333333333

Reorder the terms:
1.333333333 + -1.333333333 + 2.444444444x + x2 = 0 + -1.333333333

Combine like terms: 1.333333333 + -1.333333333 = 0.000000000
0.000000000 + 2.444444444x + x2 = 0 + -1.333333333
2.444444444x + x2 = 0 + -1.333333333

Combine like terms: 0 + -1.333333333 = -1.333333333
2.444444444x + x2 = -1.333333333

The x term is 2.444444444x.  Take half its coefficient (1.222222222).
Square it (1.493827160) and add it to both sides.

Add '1.493827160' to each side of the equation.
2.444444444x + 1.493827160 + x2 = -1.333333333 + 1.493827160

Reorder the terms:
1.493827160 + 2.444444444x + x2 = -1.333333333 + 1.493827160

Combine like terms: -1.333333333 + 1.493827160 = 0.160493827
1.493827160 + 2.444444444x + x2 = 0.160493827

Factor a perfect square on the left side:
(x + 1.222222222)(x + 1.222222222) = 0.160493827

Calculate the square root of the right side: 0.400616808

Break this problem into two subproblems by setting 
(x + 1.222222222) equal to 0.400616808 and -0.400616808.

Subproblem 1

x + 1.222222222 = 0.400616808 Simplifying x + 1.222222222 = 0.400616808 Reorder the terms: 1.222222222 + x = 0.400616808 Solving 1.222222222 + x = 0.400616808 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.222222222' to each side of the equation. 1.222222222 + -1.222222222 + x = 0.400616808 + -1.222222222 Combine like terms: 1.222222222 + -1.222222222 = 0.000000000 0.000000000 + x = 0.400616808 + -1.222222222 x = 0.400616808 + -1.222222222 Combine like terms: 0.400616808 + -1.222222222 = -0.821605414 x = -0.821605414 Simplifying x = -0.821605414

Subproblem 2

x + 1.222222222 = -0.400616808 Simplifying x + 1.222222222 = -0.400616808 Reorder the terms: 1.222222222 + x = -0.400616808 Solving 1.222222222 + x = -0.400616808 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.222222222' to each side of the equation. 1.222222222 + -1.222222222 + x = -0.400616808 + -1.222222222 Combine like terms: 1.222222222 + -1.222222222 = 0.000000000 0.000000000 + x = -0.400616808 + -1.222222222 x = -0.400616808 + -1.222222222 Combine like terms: -0.400616808 + -1.222222222 = -1.62283903 x = -1.62283903 Simplifying x = -1.62283903

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.821605414, -1.62283903}

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