3x^2+54x-730=0

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Solution for 3x^2+54x-730=0 equation:


Simplifying
3x2 + 54x + -730 = 0

Reorder the terms:
-730 + 54x + 3x2 = 0

Solving
-730 + 54x + 3x2 = 0

Solving for variable 'x'.

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

Divide each side by '3'.
-243.3333333 + 18x + x2 = 0

Move the constant term to the right:

Add '243.3333333' to each side of the equation.
-243.3333333 + 18x + 243.3333333 + x2 = 0 + 243.3333333

Reorder the terms:
-243.3333333 + 243.3333333 + 18x + x2 = 0 + 243.3333333

Combine like terms: -243.3333333 + 243.3333333 = 0.0000000
0.0000000 + 18x + x2 = 0 + 243.3333333
18x + x2 = 0 + 243.3333333

Combine like terms: 0 + 243.3333333 = 243.3333333
18x + x2 = 243.3333333

The x term is 18x.  Take half its coefficient (9).
Square it (81) and add it to both sides.

Add '81' to each side of the equation.
18x + 81 + x2 = 243.3333333 + 81

Reorder the terms:
81 + 18x + x2 = 243.3333333 + 81

Combine like terms: 243.3333333 + 81 = 324.3333333
81 + 18x + x2 = 324.3333333

Factor a perfect square on the left side:
(x + 9)(x + 9) = 324.3333333

Calculate the square root of the right side: 18.009256878

Break this problem into two subproblems by setting 
(x + 9) equal to 18.009256878 and -18.009256878.

Subproblem 1

x + 9 = 18.009256878 Simplifying x + 9 = 18.009256878 Reorder the terms: 9 + x = 18.009256878 Solving 9 + x = 18.009256878 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + x = 18.009256878 + -9 Combine like terms: 9 + -9 = 0 0 + x = 18.009256878 + -9 x = 18.009256878 + -9 Combine like terms: 18.009256878 + -9 = 9.009256878 x = 9.009256878 Simplifying x = 9.009256878

Subproblem 2

x + 9 = -18.009256878 Simplifying x + 9 = -18.009256878 Reorder the terms: 9 + x = -18.009256878 Solving 9 + x = -18.009256878 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + x = -18.009256878 + -9 Combine like terms: 9 + -9 = 0 0 + x = -18.009256878 + -9 x = -18.009256878 + -9 Combine like terms: -18.009256878 + -9 = -27.009256878 x = -27.009256878 Simplifying x = -27.009256878

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.009256878, -27.009256878}

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