9x^2-54x+74=0

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Solution for 9x^2-54x+74=0 equation:


Simplifying
9x2 + -54x + 74 = 0

Reorder the terms:
74 + -54x + 9x2 = 0

Solving
74 + -54x + 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'.
8.222222222 + -6x + x2 = 0

Move the constant term to the right:

Add '-8.222222222' to each side of the equation.
8.222222222 + -6x + -8.222222222 + x2 = 0 + -8.222222222

Reorder the terms:
8.222222222 + -8.222222222 + -6x + x2 = 0 + -8.222222222

Combine like terms: 8.222222222 + -8.222222222 = 0.000000000
0.000000000 + -6x + x2 = 0 + -8.222222222
-6x + x2 = 0 + -8.222222222

Combine like terms: 0 + -8.222222222 = -8.222222222
-6x + x2 = -8.222222222

The x term is -6x.  Take half its coefficient (-3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
-6x + 9 + x2 = -8.222222222 + 9

Reorder the terms:
9 + -6x + x2 = -8.222222222 + 9

Combine like terms: -8.222222222 + 9 = 0.777777778
9 + -6x + x2 = 0.777777778

Factor a perfect square on the left side:
(x + -3)(x + -3) = 0.777777778

Calculate the square root of the right side: 0.881917104

Break this problem into two subproblems by setting 
(x + -3) equal to 0.881917104 and -0.881917104.

Subproblem 1

x + -3 = 0.881917104 Simplifying x + -3 = 0.881917104 Reorder the terms: -3 + x = 0.881917104 Solving -3 + x = 0.881917104 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + x = 0.881917104 + 3 Combine like terms: -3 + 3 = 0 0 + x = 0.881917104 + 3 x = 0.881917104 + 3 Combine like terms: 0.881917104 + 3 = 3.881917104 x = 3.881917104 Simplifying x = 3.881917104

Subproblem 2

x + -3 = -0.881917104 Simplifying x + -3 = -0.881917104 Reorder the terms: -3 + x = -0.881917104 Solving -3 + x = -0.881917104 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + x = -0.881917104 + 3 Combine like terms: -3 + 3 = 0 0 + x = -0.881917104 + 3 x = -0.881917104 + 3 Combine like terms: -0.881917104 + 3 = 2.118082896 x = 2.118082896 Simplifying x = 2.118082896

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.881917104, 2.118082896}

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