Expression 21: negative StartRoot, "R" squared minus "x" squared , EndRoot equals negative left parenthesis, "x" minus "D" Subscript, 1 , Baseline , right parenthesis minus "R"−R2−x2=−x−D1−R
21
Expression 22: "R" squared minus "x" squared equals left parenthesis, "x" minus "D" Subscript, 1 , Baseline plus "R" , right parenthesis squaredR2−x2=x−D1+R2
22
Expression 23: "a" "x" squared plus "b" "x" plus "c" equals 0ax2+bx+c=0
23
Expression 24: "E" Subscript, 1 , Baseline equals StartFraction, negative "b" plus StartRoot, "b" squared minus 4 "a" "c" , EndRoot Over 2 "a" , EndFractionE1=−b+b2−4ac2a