Expression 6: "x" squared plus left parenthesis, "x" plus 1 , right parenthesis squared equals 5 squared Has graph. To audio trace, press ALT+T.x2+x+12=52
6
Expression 7: "x" squared plus "x" squared plus 1 plus 2 "x" equals 25 Has graph. To audio trace, press ALT+T.x2+x2+1+2x=25
7
Expression 8: "f" left parenthesis, "x" , right parenthesis equals 2 "x" squared plus 2 "x" minus 24 Has graph. To audio trace, press ALT+T.fx=2x2+2x−24
8
Expression 9: "x" Subscript, 1 , Baseline equals StartFraction, negative 2 plus StartRoot, 2 squared minus 4 times 2 times left parenthesis, negative 24 , right parenthesis , EndRoot Over 2 times 2 , EndFraction equals 3x1=−2+22−4·2·−242·2
equals=
33
9
Expression 10: "x" Subscript, 2 , Baseline equals StartFraction, negative 2 minus StartRoot, 2 squared minus 4 times 2 times left parenthesis, negative 24 , right parenthesis , EndRoot Over 2 times 2 , EndFraction equals negative 4x2=−2−22−4·2·−242·2
