表达式9: "x" squared plus "y" squared equals left parenthesis, StartFraction, "x" squared plus 1 Over 2 , EndFraction , right parenthesis squaredx2+y2=x2+122
9
表达式10: "y" squared equals left parenthesis, StartFraction, "x" squared plus 1 Over 2 , EndFraction , right parenthesis squared negative "x" squaredy2=x2+122−x2
10
表达式11: "y" squared equals left parenthesis, StartFraction, "x" squared minus 2 "x" plus 1 Over 2 , EndFraction , right parenthesis left parenthesis, StartFraction, "x" squared plus 2 "x" plus 1 Over 2 , EndFraction , right parenthesisy2=x2−2x+12x2+2x+12
11
表达式12: "y" squared equals 1 quarter left parenthesis, "x" minus 1 , right parenthesis squared left parenthesis, "x" plus 1 , right parenthesis squaredy2=14x−12x+12
12
表达式13: "y" squared equals left parenthesis, StartFraction, left parenthesis, "x" minus 1 , right parenthesis left parenthesis, "x" plus 1 , right parenthesis Over 2 , EndFraction , right parenthesis squaredy2=x−1x+122
13
Siis käyrä on kaksi parabelia
14
表达式15: "y" equals StartFraction, "x" squared minus 1 Over 2 , EndFractiony=x2−12
15
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16
表达式17: "y" equals negative StartFraction, "x" squared minus 1 Over 2 , EndFractiony=−x2−12
