3x^2+18x-49=0

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Solution for 3x^2+18x-49=0 equation:


Simplifying
3x2 + 18x + -49 = 0

Reorder the terms:
-49 + 18x + 3x2 = 0

Solving
-49 + 18x + 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'.
-16.33333333 + 6x + x2 = 0

Move the constant term to the right:

Add '16.33333333' to each side of the equation.
-16.33333333 + 6x + 16.33333333 + x2 = 0 + 16.33333333

Reorder the terms:
-16.33333333 + 16.33333333 + 6x + x2 = 0 + 16.33333333

Combine like terms: -16.33333333 + 16.33333333 = 0.00000000
0.00000000 + 6x + x2 = 0 + 16.33333333
6x + x2 = 0 + 16.33333333

Combine like terms: 0 + 16.33333333 = 16.33333333
6x + x2 = 16.33333333

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 = 16.33333333 + 9

Reorder the terms:
9 + 6x + x2 = 16.33333333 + 9

Combine like terms: 16.33333333 + 9 = 25.33333333
9 + 6x + x2 = 25.33333333

Factor a perfect square on the left side:
(x + 3)(x + 3) = 25.33333333

Calculate the square root of the right side: 5.033222957

Break this problem into two subproblems by setting 
(x + 3) equal to 5.033222957 and -5.033222957.

Subproblem 1

x + 3 = 5.033222957 Simplifying x + 3 = 5.033222957 Reorder the terms: 3 + x = 5.033222957 Solving 3 + x = 5.033222957 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 = 5.033222957 + -3 Combine like terms: 3 + -3 = 0 0 + x = 5.033222957 + -3 x = 5.033222957 + -3 Combine like terms: 5.033222957 + -3 = 2.033222957 x = 2.033222957 Simplifying x = 2.033222957

Subproblem 2

x + 3 = -5.033222957 Simplifying x + 3 = -5.033222957 Reorder the terms: 3 + x = -5.033222957 Solving 3 + x = -5.033222957 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 = -5.033222957 + -3 Combine like terms: 3 + -3 = 0 0 + x = -5.033222957 + -3 x = -5.033222957 + -3 Combine like terms: -5.033222957 + -3 = -8.033222957 x = -8.033222957 Simplifying x = -8.033222957

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.033222957, -8.033222957}

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