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Simplifying
-121 = -1y2
Solving
-121 = -1y2
Solving for variable 'y'.
Move all terms containing y to the left, all other terms to the right.
Add 'y2' to each side of the equation.
-121 + y2 = -1y2 + y2
Combine like terms: -1y2 + y2 = 0
-121 + y2 = 0
Add '121' to each side of the equation.
-121 + 121 + y2 = 0 + 121
Combine like terms: -121 + 121 = 0
0 + y2 = 0 + 121
y2 = 0 + 121
Combine like terms: 0 + 121 = 121
y2 = 121
Simplifying
y2 = 121
Take the square root of each side:
y = {-11, 11}
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