w+9=w^2+3w-4

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Solution for w+9=w^2+3w-4 equation:


Simplifying
w + 9 = w2 + 3w + -4

Reorder the terms:
9 + w = w2 + 3w + -4

Reorder the terms:
9 + w = -4 + 3w + w2

Solving
9 + w = -4 + 3w + w2

Solving for variable 'w'.

Reorder the terms:
9 + 4 + w + -3w + -1w2 = -4 + 3w + w2 + 4 + -3w + -1w2

Combine like terms: 9 + 4 = 13
13 + w + -3w + -1w2 = -4 + 3w + w2 + 4 + -3w + -1w2

Combine like terms: w + -3w = -2w
13 + -2w + -1w2 = -4 + 3w + w2 + 4 + -3w + -1w2

Reorder the terms:
13 + -2w + -1w2 = -4 + 4 + 3w + -3w + w2 + -1w2

Combine like terms: -4 + 4 = 0
13 + -2w + -1w2 = 0 + 3w + -3w + w2 + -1w2
13 + -2w + -1w2 = 3w + -3w + w2 + -1w2

Combine like terms: 3w + -3w = 0
13 + -2w + -1w2 = 0 + w2 + -1w2
13 + -2w + -1w2 = w2 + -1w2

Combine like terms: w2 + -1w2 = 0
13 + -2w + -1w2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-13 + 2w + w2 = 0

Move the constant term to the right:

Add '13' to each side of the equation.
-13 + 2w + 13 + w2 = 0 + 13

Reorder the terms:
-13 + 13 + 2w + w2 = 0 + 13

Combine like terms: -13 + 13 = 0
0 + 2w + w2 = 0 + 13
2w + w2 = 0 + 13

Combine like terms: 0 + 13 = 13
2w + w2 = 13

The w term is 2w.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2w + 1 + w2 = 13 + 1

Reorder the terms:
1 + 2w + w2 = 13 + 1

Combine like terms: 13 + 1 = 14
1 + 2w + w2 = 14

Factor a perfect square on the left side:
(w + 1)(w + 1) = 14

Calculate the square root of the right side: 3.741657387

Break this problem into two subproblems by setting 
(w + 1) equal to 3.741657387 and -3.741657387.

Subproblem 1

w + 1 = 3.741657387 Simplifying w + 1 = 3.741657387 Reorder the terms: 1 + w = 3.741657387 Solving 1 + w = 3.741657387 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + w = 3.741657387 + -1 Combine like terms: 1 + -1 = 0 0 + w = 3.741657387 + -1 w = 3.741657387 + -1 Combine like terms: 3.741657387 + -1 = 2.741657387 w = 2.741657387 Simplifying w = 2.741657387

Subproblem 2

w + 1 = -3.741657387 Simplifying w + 1 = -3.741657387 Reorder the terms: 1 + w = -3.741657387 Solving 1 + w = -3.741657387 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + w = -3.741657387 + -1 Combine like terms: 1 + -1 = 0 0 + w = -3.741657387 + -1 w = -3.741657387 + -1 Combine like terms: -3.741657387 + -1 = -4.741657387 w = -4.741657387 Simplifying w = -4.741657387

Solution

The solution to the problem is based on the solutions from the subproblems. w = {2.741657387, -4.741657387}

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