5x+76=9x^2+54x+36

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Solution for 5x+76=9x^2+54x+36 equation:


Simplifying
5x + 76 = 9x2 + 54x + 36

Reorder the terms:
76 + 5x = 9x2 + 54x + 36

Reorder the terms:
76 + 5x = 36 + 54x + 9x2

Solving
76 + 5x = 36 + 54x + 9x2

Solving for variable 'x'.

Reorder the terms:
76 + -36 + 5x + -54x + -9x2 = 36 + 54x + 9x2 + -36 + -54x + -9x2

Combine like terms: 76 + -36 = 40
40 + 5x + -54x + -9x2 = 36 + 54x + 9x2 + -36 + -54x + -9x2

Combine like terms: 5x + -54x = -49x
40 + -49x + -9x2 = 36 + 54x + 9x2 + -36 + -54x + -9x2

Reorder the terms:
40 + -49x + -9x2 = 36 + -36 + 54x + -54x + 9x2 + -9x2

Combine like terms: 36 + -36 = 0
40 + -49x + -9x2 = 0 + 54x + -54x + 9x2 + -9x2
40 + -49x + -9x2 = 54x + -54x + 9x2 + -9x2

Combine like terms: 54x + -54x = 0
40 + -49x + -9x2 = 0 + 9x2 + -9x2
40 + -49x + -9x2 = 9x2 + -9x2

Combine like terms: 9x2 + -9x2 = 0
40 + -49x + -9x2 = 0

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

Divide each side by '-9'.
-4.444444444 + 5.444444444x + x2 = 0

Move the constant term to the right:

Add '4.444444444' to each side of the equation.
-4.444444444 + 5.444444444x + 4.444444444 + x2 = 0 + 4.444444444

Reorder the terms:
-4.444444444 + 4.444444444 + 5.444444444x + x2 = 0 + 4.444444444

Combine like terms: -4.444444444 + 4.444444444 = 0.000000000
0.000000000 + 5.444444444x + x2 = 0 + 4.444444444
5.444444444x + x2 = 0 + 4.444444444

Combine like terms: 0 + 4.444444444 = 4.444444444
5.444444444x + x2 = 4.444444444

The x term is 5.444444444x.  Take half its coefficient (2.722222222).
Square it (7.410493826) and add it to both sides.

Add '7.410493826' to each side of the equation.
5.444444444x + 7.410493826 + x2 = 4.444444444 + 7.410493826

Reorder the terms:
7.410493826 + 5.444444444x + x2 = 4.444444444 + 7.410493826

Combine like terms: 4.444444444 + 7.410493826 = 11.85493827
7.410493826 + 5.444444444x + x2 = 11.85493827

Factor a perfect square on the left side:
(x + 2.722222222)(x + 2.722222222) = 11.85493827

Calculate the square root of the right side: 3.443100096

Break this problem into two subproblems by setting 
(x + 2.722222222) equal to 3.443100096 and -3.443100096.

Subproblem 1

x + 2.722222222 = 3.443100096 Simplifying x + 2.722222222 = 3.443100096 Reorder the terms: 2.722222222 + x = 3.443100096 Solving 2.722222222 + x = 3.443100096 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.722222222' to each side of the equation. 2.722222222 + -2.722222222 + x = 3.443100096 + -2.722222222 Combine like terms: 2.722222222 + -2.722222222 = 0.000000000 0.000000000 + x = 3.443100096 + -2.722222222 x = 3.443100096 + -2.722222222 Combine like terms: 3.443100096 + -2.722222222 = 0.720877874 x = 0.720877874 Simplifying x = 0.720877874

Subproblem 2

x + 2.722222222 = -3.443100096 Simplifying x + 2.722222222 = -3.443100096 Reorder the terms: 2.722222222 + x = -3.443100096 Solving 2.722222222 + x = -3.443100096 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.722222222' to each side of the equation. 2.722222222 + -2.722222222 + x = -3.443100096 + -2.722222222 Combine like terms: 2.722222222 + -2.722222222 = 0.000000000 0.000000000 + x = -3.443100096 + -2.722222222 x = -3.443100096 + -2.722222222 Combine like terms: -3.443100096 + -2.722222222 = -6.165322318 x = -6.165322318 Simplifying x = -6.165322318

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.720877874, -6.165322318}

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