Expression 20: "m" Subscript, 1 , Baseline left parenthesis, "x" minus "B" Subscript, 1 , Baseline , right parenthesis plus "B" Subscript, 2 , Baseline equals StartRoot, "R" squared minus "x" squared , EndRootm1x−B1+B2=R2−x2
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Expression 21: left parenthesis, "m" squared plus 1 , right parenthesis "x" squared plus 2 "m" Subscript, 1 , Baseline "B" Subscript, 2 , Baseline "x" plus "B" squared minus "R" squared equals 0m21+1x2+2m1B2x+B22−R2=0
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Expression 22: "E" Subscript, 1 , Baseline equals StartFraction, negative "b" plus StartRoot, "b" squared minus 4 "a" "c" , EndRoot Over 2 "a" , EndFractionE1=−b+b2−4ac2a