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Simplifying
81 + 4y2 + -324 = 0
Reorder the terms:
81 + -324 + 4y2 = 0
Combine like terms: 81 + -324 = -243
-243 + 4y2 = 0
Solving
-243 + 4y2 = 0
Solving for variable 'y'.
Move all terms containing y to the left, all other terms to the right.
Add '243' to each side of the equation.
-243 + 243 + 4y2 = 0 + 243
Combine like terms: -243 + 243 = 0
0 + 4y2 = 0 + 243
4y2 = 0 + 243
Combine like terms: 0 + 243 = 243
4y2 = 243
Divide each side by '4'.
y2 = 60.75
Simplifying
y2 = 60.75
Take the square root of each side:
y = {-7.794228634, 7.794228634}
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