表达式5: left parenthesis, "x" minus "x" Subscript, 0 , Baseline , right parenthesis squared plus left parenthesis, "y" minus left parenthesis, StartFraction, negative 4 "x" Subscript, 0 , Baseline plus 58 minus StartRoot, negative 880 "x" Subscript, 0 , Baseline minus 220 , EndRoot Over 8 , EndFraction , right parenthesis , right parenthesis squared equals left parenthesis, "x" Subscript, 0 , Baseline plus 3 , right parenthesis squared plus left parenthesis, left parenthesis, StartFraction, negative 4 "x" Subscript, 0 , Baseline plus 58 minus StartRoot, negative 880 "x" Subscript, 0 , Baseline minus 220 , EndRoot Over 8 , EndFraction , right parenthesis minus 6 , right parenthesis squaredx−x02+y−−4x0+58−−880x0−22082=x0+32+−4x0+58−−880x0−2208−62
5
表达式6: left parenthesis, "x" minus "x" Subscript, 0 , Baseline , right parenthesis squared plus left parenthesis, "y" minus left parenthesis, StartFraction, negative 4 "x" Subscript, 0 , Baseline plus 58 plus StartRoot, negative 880 "x" Subscript, 0 , Baseline minus 220 , EndRoot Over 8 , EndFraction , right parenthesis , right parenthesis squared equals left parenthesis, "x" Subscript, 0 , Baseline plus 3 , right parenthesis squared plus left parenthesis, left parenthesis, StartFraction, negative 4 "x" Subscript, 0 , Baseline plus 58 plus StartRoot, negative 880 "x" Subscript, 0 , Baseline minus 220 , EndRoot Over 8 , EndFraction , right parenthesis minus 6 , right parenthesis squaredx−x02+y−−4x0+58+−880x0−22082=x0+32+−4x0+58+−880x0−2208−62
6
表达式7: "x" Subscript, 0 , Baseline equals negative 0.2 5x0=−0.25
