y^2-99=0

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Solution for y^2-99=0 equation: 


Simplifying
y2 + -99 = 0

Reorder the terms:
-99 + y2 = 0

Solving
-99 + y2 = 0

Solving for variable 'y'.

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

Add '99' to each side of the equation.
-99 + 99 + y2 = 0 + 99

Combine like terms: -99 + 99 = 0
0 + y2 = 0 + 99
y2 = 0 + 99

Combine like terms: 0 + 99 = 99
y2 = 99

Simplifying
y2 = 99

Take the square root of each side:
y = {-9.949874371, 9.949874371}

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