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Simplifying
2y2 + -4 = 0
Reorder the terms:
-4 + 2y2 = 0
Solving
-4 + 2y2 = 0
Solving for variable 'y'.
Move all terms containing y to the left, all other terms to the right.
Add '4' to each side of the equation.
-4 + 4 + 2y2 = 0 + 4
Combine like terms: -4 + 4 = 0
0 + 2y2 = 0 + 4
2y2 = 0 + 4
Combine like terms: 0 + 4 = 4
2y2 = 4
Divide each side by '2'.
y2 = 2
Simplifying
y2 = 2
Take the square root of each side:
y = {-1.414213562, 1.414213562}
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