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Simplifying
2y2 + 4 = 9
Reorder the terms:
4 + 2y2 = 9
Solving
4 + 2y2 = 9
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 = 9 + -4
Combine like terms: 4 + -4 = 0
0 + 2y2 = 9 + -4
2y2 = 9 + -4
Combine like terms: 9 + -4 = 5
2y2 = 5
Divide each side by '2'.
y2 = 2.5
Simplifying
y2 = 2.5
Take the square root of each side:
y = {-1.58113883, 1.58113883}
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