81-16q^2=

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Solution for 81-16q^2= equation: 


Simplifying
81 + -16q2 = 0

Solving
81 + -16q2 = 0

Solving for variable 'q'.

Move all terms containing q to the left, all other terms to the right.

Add '-81' to each side of the equation.
81 + -81 + -16q2 = 0 + -81

Combine like terms: 81 + -81 = 0
0 + -16q2 = 0 + -81
-16q2 = 0 + -81

Combine like terms: 0 + -81 = -81
-16q2 = -81

Divide each side by '-16'.
q2 = 5.0625

Simplifying
q2 = 5.0625

Take the square root of each side:
q = {-2.25, 2.25}

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