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Simplifying
-3y2 + 27 = 0
Reorder the terms:
27 + -3y2 = 0
Solving
27 + -3y2 = 0
Solving for variable 'y'.
Move all terms containing y to the left, all other terms to the right.
Add '-27' to each side of the equation.
27 + -27 + -3y2 = 0 + -27
Combine like terms: 27 + -27 = 0
0 + -3y2 = 0 + -27
-3y2 = 0 + -27
Combine like terms: 0 + -27 = -27
-3y2 = -27
Divide each side by '-3'.
y2 = 9
Simplifying
y2 = 9
Take the square root of each side:
y = {-3, 3}
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