Expression 16: "C" squared equals left parenthesis, "D" Subscript, 1 , Baseline minus "E" Subscript, 1 , Baseline , right parenthesis squared plus left parenthesis, "D" Subscript, 2 , Baseline minus "E" Subscript, 2 , Baseline , right parenthesis squaredC21=D1−E12+D2−E22
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Expression 17: 3 "h" squared "D" squared plus left parenthesis, "h" minus 4 "h" squared , right parenthesis "D" Subscript, 1 , Baseline plus "h" squared minus 3 equals 03h2D21+h−4h2D1+h2−3=0
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Expression 18: "D" Subscript, 1 , Baseline equals StartFraction, negative "b" minus StartRoot, "b" squared minus 4 "a" "c" , EndRoot Over 2 "a" , EndFractionD1=−b−b2−4ac2a
