20=8+w*w

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Solution for 20=8+w*w equation: 


Simplifying
20 = 8 + w * w

Multiply w * w
20 = 8 + w2

Solving
20 = 8 + w2

Solving for variable 'w'.

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

Add '-1w2' to each side of the equation.
20 + -1w2 = 8 + w2 + -1w2

Combine like terms: w2 + -1w2 = 0
20 + -1w2 = 8 + 0
20 + -1w2 = 8

Add '-20' to each side of the equation.
20 + -20 + -1w2 = 8 + -20

Combine like terms: 20 + -20 = 0
0 + -1w2 = 8 + -20
-1w2 = 8 + -20

Combine like terms: 8 + -20 = -12
-1w2 = -12

Divide each side by '-1'.
w2 = 12

Simplifying
w2 = 12

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

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