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Simplifying
-121 = -4y2
Solving
-121 = -4y2
Solving for variable 'y'.
Move all terms containing y to the left, all other terms to the right.
Add '4y2' to each side of the equation.
-121 + 4y2 = -4y2 + 4y2
Combine like terms: -4y2 + 4y2 = 0
-121 + 4y2 = 0
Add '121' to each side of the equation.
-121 + 121 + 4y2 = 0 + 121
Combine like terms: -121 + 121 = 0
0 + 4y2 = 0 + 121
4y2 = 0 + 121
Combine like terms: 0 + 121 = 121
4y2 = 121
Divide each side by '4'.
y2 = 30.25
Simplifying
y2 = 30.25
Take the square root of each side:
y = {-5.5, 5.5}
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