3w^2=8w+20

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Solution for 3w^2=8w+20 equation:


Simplifying
3w2 = 8w + 20

Reorder the terms:
3w2 = 20 + 8w

Solving
3w2 = 20 + 8w

Solving for variable 'w'.

Reorder the terms:
-20 + -8w + 3w2 = 20 + 8w + -20 + -8w

Reorder the terms:
-20 + -8w + 3w2 = 20 + -20 + 8w + -8w

Combine like terms: 20 + -20 = 0
-20 + -8w + 3w2 = 0 + 8w + -8w
-20 + -8w + 3w2 = 8w + -8w

Combine like terms: 8w + -8w = 0
-20 + -8w + 3w2 = 0

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

Divide each side by '3'.
-6.666666667 + -2.666666667w + w2 = 0

Move the constant term to the right:

Add '6.666666667' to each side of the equation.
-6.666666667 + -2.666666667w + 6.666666667 + w2 = 0 + 6.666666667

Reorder the terms:
-6.666666667 + 6.666666667 + -2.666666667w + w2 = 0 + 6.666666667

Combine like terms: -6.666666667 + 6.666666667 = 0.000000000
0.000000000 + -2.666666667w + w2 = 0 + 6.666666667
-2.666666667w + w2 = 0 + 6.666666667

Combine like terms: 0 + 6.666666667 = 6.666666667
-2.666666667w + w2 = 6.666666667

The w term is -2.666666667w.  Take half its coefficient (-1.333333334).
Square it (1.777777780) and add it to both sides.

Add '1.777777780' to each side of the equation.
-2.666666667w + 1.777777780 + w2 = 6.666666667 + 1.777777780

Reorder the terms:
1.777777780 + -2.666666667w + w2 = 6.666666667 + 1.777777780

Combine like terms: 6.666666667 + 1.777777780 = 8.444444447
1.777777780 + -2.666666667w + w2 = 8.444444447

Factor a perfect square on the left side:
(w + -1.333333334)(w + -1.333333334) = 8.444444447

Calculate the square root of the right side: 2.905932629

Break this problem into two subproblems by setting 
(w + -1.333333334) equal to 2.905932629 and -2.905932629.

Subproblem 1

w + -1.333333334 = 2.905932629 Simplifying w + -1.333333334 = 2.905932629 Reorder the terms: -1.333333334 + w = 2.905932629 Solving -1.333333334 + w = 2.905932629 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '1.333333334' to each side of the equation. -1.333333334 + 1.333333334 + w = 2.905932629 + 1.333333334 Combine like terms: -1.333333334 + 1.333333334 = 0.000000000 0.000000000 + w = 2.905932629 + 1.333333334 w = 2.905932629 + 1.333333334 Combine like terms: 2.905932629 + 1.333333334 = 4.239265963 w = 4.239265963 Simplifying w = 4.239265963

Subproblem 2

w + -1.333333334 = -2.905932629 Simplifying w + -1.333333334 = -2.905932629 Reorder the terms: -1.333333334 + w = -2.905932629 Solving -1.333333334 + w = -2.905932629 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '1.333333334' to each side of the equation. -1.333333334 + 1.333333334 + w = -2.905932629 + 1.333333334 Combine like terms: -1.333333334 + 1.333333334 = 0.000000000 0.000000000 + w = -2.905932629 + 1.333333334 w = -2.905932629 + 1.333333334 Combine like terms: -2.905932629 + 1.333333334 = -1.572599295 w = -1.572599295 Simplifying w = -1.572599295

Solution

The solution to the problem is based on the solutions from the subproblems. w = {4.239265963, -1.572599295}

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