Expression 9: "Y" equals StartFraction, negative "a" Over 2 , EndFraction plus StartRoot, left parenthesis, StartFraction, negative "a" Over 2 , EndFraction , right parenthesis squared minus "b" , EndRootY=−a2+−a22−b
equals=
1.6 6 6 6 6 6 6 6 6 6 71.66666666667
9
Expression 10: "X" equals 4 minus "k" minus "Y"X=4−k−Y