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Simplifying
81y2 + -625 = 0
Reorder the terms:
-625 + 81y2 = 0
Solving
-625 + 81y2 = 0
Solving for variable 'y'.
Move all terms containing y to the left, all other terms to the right.
Add '625' to each side of the equation.
-625 + 625 + 81y2 = 0 + 625
Combine like terms: -625 + 625 = 0
0 + 81y2 = 0 + 625
81y2 = 0 + 625
Combine like terms: 0 + 625 = 625
81y2 = 625
Divide each side by '81'.
y2 = 7.716049383
Simplifying
y2 = 7.716049383
Take the square root of each side:
y = {-2.777777778, 2.777777778}
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