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Simplifying
-2y2 + 0y + 8 = 0
Anything times zero is zero.
-2y2 + 0y + 8 = 0
Reorder the terms:
0 + 8 + -2y2 = 0
Combine like terms: 0 + 8 = 8
8 + -2y2 = 0
Solving
8 + -2y2 = 0
Solving for variable 'y'.
Move all terms containing y to the left, all other terms to the right.
Add '-8' to each side of the equation.
8 + -8 + -2y2 = 0 + -8
Combine like terms: 8 + -8 = 0
0 + -2y2 = 0 + -8
-2y2 = 0 + -8
Combine like terms: 0 + -8 = -8
-2y2 = -8
Divide each side by '-2'.
y2 = 4
Simplifying
y2 = 4
Take the square root of each side:
y = {-2, 2}
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