Solve for b
b=\frac{2}{27}\approx 0.074074074
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54b=\sqrt{20-2^{2}}
Multiply both sides of the equation by 9.
54b=\sqrt{20-4}
Calculate 2 to the power of 2 and get 4.
54b=\sqrt{16}
Subtract 4 from 20 to get 16.
54b=4
Calculate the square root of 16 and get 4.
b=\frac{4}{54}
Divide both sides by 54.
b=\frac{2}{27}
Reduce the fraction \frac{4}{54} to lowest terms by extracting and canceling out 2.
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