Expression 18: "m" Subscript, 1 , Baseline left parenthesis, "x" minus "A" Subscript, 1 , Baseline , right parenthesis equals StartRoot, "R" squared minus "x" squared , EndRootm1x−A1=R2−x2
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Expression 19: left parenthesis, "m" squared plus 1 , right parenthesis "x" squared minus 2 "m" squared "A" Subscript, 1 , Baseline "x" plus "m" squared "A" squared minus "R" squared equals 0m21+1x2−2m21A1x+m21A21−R2=0
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Expression 20: "C" Subscript, 1 , Baseline equals StartFraction, negative "b" plus StartRoot, "b" squared minus 4 "a" "c" , EndRoot Over 2 "a" , EndFractionC1=−b+b2−4ac2a