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Simplifying
81 + -64b2 = 0
Solving
81 + -64b2 = 0
Solving for variable 'b'.
Move all terms containing b to the left, all other terms to the right.
Add '-81' to each side of the equation.
81 + -81 + -64b2 = 0 + -81
Combine like terms: 81 + -81 = 0
0 + -64b2 = 0 + -81
-64b2 = 0 + -81
Combine like terms: 0 + -81 = -81
-64b2 = -81
Divide each side by '-64'.
b2 = 1.265625
Simplifying
b2 = 1.265625
Take the square root of each side:
b = {-1.125, 1.125}
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