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Simplifying
0 = 81s2 + -49
Reorder the terms:
0 = -49 + 81s2
Solving
0 = -49 + 81s2
Solving for variable 's'.
Move all terms containing s to the left, all other terms to the right.
Add '-81s2' to each side of the equation.
0 + -81s2 = -49 + 81s2 + -81s2
Remove the zero:
-81s2 = -49 + 81s2 + -81s2
Combine like terms: 81s2 + -81s2 = 0
-81s2 = -49 + 0
-81s2 = -49
Divide each side by '-81'.
s2 = 0.6049382716
Simplifying
s2 = 0.6049382716
Take the square root of each side:
s = {-0.777777778, 0.777777778}
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