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Simplifying
2y2 + -20 + 8 = 0
Reorder the terms:
-20 + 8 + 2y2 = 0
Combine like terms: -20 + 8 = -12
-12 + 2y2 = 0
Solving
-12 + 2y2 = 0
Solving for variable 'y'.
Move all terms containing y to the left, all other terms to the right.
Add '12' to each side of the equation.
-12 + 12 + 2y2 = 0 + 12
Combine like terms: -12 + 12 = 0
0 + 2y2 = 0 + 12
2y2 = 0 + 12
Combine like terms: 0 + 12 = 12
2y2 = 12
Divide each side by '2'.
y2 = 6
Simplifying
y2 = 6
Take the square root of each side:
y = {-2.449489743, 2.449489743}
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