W^2+9=21

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Solution for W^2+9=21 equation: 


Simplifying
W2 + 9 = 21

Reorder the terms:
9 + W2 = 21

Solving
9 + W2 = 21

Solving for variable 'W'.

Move all terms containing W to the left, all other terms to the right.

Add '-9' to each side of the equation.
9 + -9 + W2 = 21 + -9

Combine like terms: 9 + -9 = 0
0 + W2 = 21 + -9
W2 = 21 + -9

Combine like terms: 21 + -9 = 12
W2 = 12

Simplifying
W2 = 12

Take the square root of each side:
W = {-3.464101615, 3.464101615}

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