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

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


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

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

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

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

Solving for variable 'x'.

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

Combine like terms: 76 + -54 = 22
22 + 5x + -36x + -9x2 = 54 + 36x + 9x2 + -54 + -36x + -9x2

Combine like terms: 5x + -36x = -31x
22 + -31x + -9x2 = 54 + 36x + 9x2 + -54 + -36x + -9x2

Reorder the terms:
22 + -31x + -9x2 = 54 + -54 + 36x + -36x + 9x2 + -9x2

Combine like terms: 54 + -54 = 0
22 + -31x + -9x2 = 0 + 36x + -36x + 9x2 + -9x2
22 + -31x + -9x2 = 36x + -36x + 9x2 + -9x2

Combine like terms: 36x + -36x = 0
22 + -31x + -9x2 = 0 + 9x2 + -9x2
22 + -31x + -9x2 = 9x2 + -9x2

Combine like terms: 9x2 + -9x2 = 0
22 + -31x + -9x2 = 0

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

Divide each side by '-9'.
-2.444444444 + 3.444444444x + x2 = 0

Move the constant term to the right:

Add '2.444444444' to each side of the equation.
-2.444444444 + 3.444444444x + 2.444444444 + x2 = 0 + 2.444444444

Reorder the terms:
-2.444444444 + 2.444444444 + 3.444444444x + x2 = 0 + 2.444444444

Combine like terms: -2.444444444 + 2.444444444 = 0.000000000
0.000000000 + 3.444444444x + x2 = 0 + 2.444444444
3.444444444x + x2 = 0 + 2.444444444

Combine like terms: 0 + 2.444444444 = 2.444444444
3.444444444x + x2 = 2.444444444

The x term is 3.444444444x.  Take half its coefficient (1.722222222).
Square it (2.966049382) and add it to both sides.

Add '2.966049382' to each side of the equation.
3.444444444x + 2.966049382 + x2 = 2.444444444 + 2.966049382

Reorder the terms:
2.966049382 + 3.444444444x + x2 = 2.444444444 + 2.966049382

Combine like terms: 2.444444444 + 2.966049382 = 5.410493826
2.966049382 + 3.444444444x + x2 = 5.410493826

Factor a perfect square on the left side:
(x + 1.722222222)(x + 1.722222222) = 5.410493826

Calculate the square root of the right side: 2.326046824

Break this problem into two subproblems by setting 
(x + 1.722222222) equal to 2.326046824 and -2.326046824.

Subproblem 1

x + 1.722222222 = 2.326046824 Simplifying x + 1.722222222 = 2.326046824 Reorder the terms: 1.722222222 + x = 2.326046824 Solving 1.722222222 + x = 2.326046824 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.722222222' to each side of the equation. 1.722222222 + -1.722222222 + x = 2.326046824 + -1.722222222 Combine like terms: 1.722222222 + -1.722222222 = 0.000000000 0.000000000 + x = 2.326046824 + -1.722222222 x = 2.326046824 + -1.722222222 Combine like terms: 2.326046824 + -1.722222222 = 0.603824602 x = 0.603824602 Simplifying x = 0.603824602

Subproblem 2

x + 1.722222222 = -2.326046824 Simplifying x + 1.722222222 = -2.326046824 Reorder the terms: 1.722222222 + x = -2.326046824 Solving 1.722222222 + x = -2.326046824 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.722222222' to each side of the equation. 1.722222222 + -1.722222222 + x = -2.326046824 + -1.722222222 Combine like terms: 1.722222222 + -1.722222222 = 0.000000000 0.000000000 + x = -2.326046824 + -1.722222222 x = -2.326046824 + -1.722222222 Combine like terms: -2.326046824 + -1.722222222 = -4.048269046 x = -4.048269046 Simplifying x = -4.048269046

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.603824602, -4.048269046}

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