3*x*x+29*x=300

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Solution for 3*x*x+29*x=300 equation:


Simplifying
3x * x + 29x = 300

Multiply x * x
3x2 + 29x = 300

Reorder the terms:
29x + 3x2 = 300

Solving
29x + 3x2 = 300

Solving for variable 'x'.

Reorder the terms:
-300 + 29x + 3x2 = 300 + -300

Combine like terms: 300 + -300 = 0
-300 + 29x + 3x2 = 0

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

Divide each side by '3'.
-100 + 9.666666667x + x2 = 0

Move the constant term to the right:

Add '100' to each side of the equation.
-100 + 9.666666667x + 100 + x2 = 0 + 100

Reorder the terms:
-100 + 100 + 9.666666667x + x2 = 0 + 100

Combine like terms: -100 + 100 = 0
0 + 9.666666667x + x2 = 0 + 100
9.666666667x + x2 = 0 + 100

Combine like terms: 0 + 100 = 100
9.666666667x + x2 = 100

The x term is 9.666666667x.  Take half its coefficient (4.833333334).
Square it (23.36111112) and add it to both sides.

Add '23.36111112' to each side of the equation.
9.666666667x + 23.36111112 + x2 = 100 + 23.36111112

Reorder the terms:
23.36111112 + 9.666666667x + x2 = 100 + 23.36111112

Combine like terms: 100 + 23.36111112 = 123.36111112
23.36111112 + 9.666666667x + x2 = 123.36111112

Factor a perfect square on the left side:
(x + 4.833333334)(x + 4.833333334) = 123.36111112

Calculate the square root of the right side: 11.106804721

Break this problem into two subproblems by setting 
(x + 4.833333334) equal to 11.106804721 and -11.106804721.

Subproblem 1

x + 4.833333334 = 11.106804721 Simplifying x + 4.833333334 = 11.106804721 Reorder the terms: 4.833333334 + x = 11.106804721 Solving 4.833333334 + x = 11.106804721 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.833333334' to each side of the equation. 4.833333334 + -4.833333334 + x = 11.106804721 + -4.833333334 Combine like terms: 4.833333334 + -4.833333334 = 0.000000000 0.000000000 + x = 11.106804721 + -4.833333334 x = 11.106804721 + -4.833333334 Combine like terms: 11.106804721 + -4.833333334 = 6.273471387 x = 6.273471387 Simplifying x = 6.273471387

Subproblem 2

x + 4.833333334 = -11.106804721 Simplifying x + 4.833333334 = -11.106804721 Reorder the terms: 4.833333334 + x = -11.106804721 Solving 4.833333334 + x = -11.106804721 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.833333334' to each side of the equation. 4.833333334 + -4.833333334 + x = -11.106804721 + -4.833333334 Combine like terms: 4.833333334 + -4.833333334 = 0.000000000 0.000000000 + x = -11.106804721 + -4.833333334 x = -11.106804721 + -4.833333334 Combine like terms: -11.106804721 + -4.833333334 = -15.940138055 x = -15.940138055 Simplifying x = -15.940138055

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.273471387, -15.940138055}

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