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Need ! give step by step solutions on how to solve number one \frac{9-2\sqrt{3} }{12+\sqrt{3} } number two x+4=\sqrt{13x-20} number three (domain and range) f(x)=2\sqrt[3]{x} +1

Bring the fraction a/a-4 to a denominator of 16-a^2

Consider circle o, where and . m∠bpd °. °.