9w^2+30w=25

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Solution for 9w^2+30w=25 equation:


Simplifying
9w2 + 30w = 25

Reorder the terms:
30w + 9w2 = 25

Solving
30w + 9w2 = 25

Solving for variable 'w'.

Reorder the terms:
-25 + 30w + 9w2 = 25 + -25

Combine like terms: 25 + -25 = 0
-25 + 30w + 9w2 = 0

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

Divide each side by '9'.
-2.777777778 + 3.333333333w + w2 = 0

Move the constant term to the right:

Add '2.777777778' to each side of the equation.
-2.777777778 + 3.333333333w + 2.777777778 + w2 = 0 + 2.777777778

Reorder the terms:
-2.777777778 + 2.777777778 + 3.333333333w + w2 = 0 + 2.777777778

Combine like terms: -2.777777778 + 2.777777778 = 0.000000000
0.000000000 + 3.333333333w + w2 = 0 + 2.777777778
3.333333333w + w2 = 0 + 2.777777778

Combine like terms: 0 + 2.777777778 = 2.777777778
3.333333333w + w2 = 2.777777778

The w term is 3.333333333w.  Take half its coefficient (1.666666667).
Square it (2.777777779) and add it to both sides.

Add '2.777777779' to each side of the equation.
3.333333333w + 2.777777779 + w2 = 2.777777778 + 2.777777779

Reorder the terms:
2.777777779 + 3.333333333w + w2 = 2.777777778 + 2.777777779

Combine like terms: 2.777777778 + 2.777777779 = 5.555555557
2.777777779 + 3.333333333w + w2 = 5.555555557

Factor a perfect square on the left side:
(w + 1.666666667)(w + 1.666666667) = 5.555555557

Calculate the square root of the right side: 2.357022604

Break this problem into two subproblems by setting 
(w + 1.666666667) equal to 2.357022604 and -2.357022604.

Subproblem 1

w + 1.666666667 = 2.357022604 Simplifying w + 1.666666667 = 2.357022604 Reorder the terms: 1.666666667 + w = 2.357022604 Solving 1.666666667 + w = 2.357022604 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-1.666666667' to each side of the equation. 1.666666667 + -1.666666667 + w = 2.357022604 + -1.666666667 Combine like terms: 1.666666667 + -1.666666667 = 0.000000000 0.000000000 + w = 2.357022604 + -1.666666667 w = 2.357022604 + -1.666666667 Combine like terms: 2.357022604 + -1.666666667 = 0.690355937 w = 0.690355937 Simplifying w = 0.690355937

Subproblem 2

w + 1.666666667 = -2.357022604 Simplifying w + 1.666666667 = -2.357022604 Reorder the terms: 1.666666667 + w = -2.357022604 Solving 1.666666667 + w = -2.357022604 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-1.666666667' to each side of the equation. 1.666666667 + -1.666666667 + w = -2.357022604 + -1.666666667 Combine like terms: 1.666666667 + -1.666666667 = 0.000000000 0.000000000 + w = -2.357022604 + -1.666666667 w = -2.357022604 + -1.666666667 Combine like terms: -2.357022604 + -1.666666667 = -4.023689271 w = -4.023689271 Simplifying w = -4.023689271

Solution

The solution to the problem is based on the solutions from the subproblems. w = {0.690355937, -4.023689271}

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