w^2+9=2w^2-2w+21

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Solution for w^2+9=2w^2-2w+21 equation:


Simplifying
w2 + 9 = 2w2 + -2w + 21

Reorder the terms:
9 + w2 = 2w2 + -2w + 21

Reorder the terms:
9 + w2 = 21 + -2w + 2w2

Solving
9 + w2 = 21 + -2w + 2w2

Solving for variable 'w'.

Reorder the terms:
9 + -21 + 2w + w2 + -2w2 = 21 + -2w + 2w2 + -21 + 2w + -2w2

Combine like terms: 9 + -21 = -12
-12 + 2w + w2 + -2w2 = 21 + -2w + 2w2 + -21 + 2w + -2w2

Combine like terms: w2 + -2w2 = -1w2
-12 + 2w + -1w2 = 21 + -2w + 2w2 + -21 + 2w + -2w2

Reorder the terms:
-12 + 2w + -1w2 = 21 + -21 + -2w + 2w + 2w2 + -2w2

Combine like terms: 21 + -21 = 0
-12 + 2w + -1w2 = 0 + -2w + 2w + 2w2 + -2w2
-12 + 2w + -1w2 = -2w + 2w + 2w2 + -2w2

Combine like terms: -2w + 2w = 0
-12 + 2w + -1w2 = 0 + 2w2 + -2w2
-12 + 2w + -1w2 = 2w2 + -2w2

Combine like terms: 2w2 + -2w2 = 0
-12 + 2w + -1w2 = 0

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

Divide each side by '-1'.
12 + -2w + w2 = 0

Move the constant term to the right:

Add '-12' to each side of the equation.
12 + -2w + -12 + w2 = 0 + -12

Reorder the terms:
12 + -12 + -2w + w2 = 0 + -12

Combine like terms: 12 + -12 = 0
0 + -2w + w2 = 0 + -12
-2w + w2 = 0 + -12

Combine like terms: 0 + -12 = -12
-2w + w2 = -12

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 = -12 + 1

Reorder the terms:
1 + -2w + w2 = -12 + 1

Combine like terms: -12 + 1 = -11
1 + -2w + w2 = -11

Factor a perfect square on the left side:
(w + -1)(w + -1) = -11

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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