表达式8: left parenthesis, "x" minus 4 , right parenthesis squared plus "y" squared equals left parenthesis, "a" plus 1 , right parenthesis squaredx−42+y2=a+12
8
表达式9: left parenthesis, "x" minus 4 , right parenthesis squared plus "y" squared equals left parenthesis, "a" plus 2 , right parenthesis squaredx−42+y2=a+22
9
表达式10: left parenthesis, "x" minus 4 , right parenthesis squared plus "y" squared equals left parenthesis, "a" plus 3 , right parenthesis squaredx−42+y2=a+32
10
表达式11: left parenthesis, "x" minus 4 , right parenthesis squared plus "y" squared equals left parenthesis, "a" plus 4 , right parenthesis squaredx−42+y2=a+42
11
S1: left parenthesis, negative 4 , 0 , right parenthesis−4,0
标签:
12
S2: left parenthesis, 4 , 0 , right parenthesis4,0