運算式 3: left parenthesis, "x" plus 10 minus "a" , right parenthesis squared plus left parenthesis, "y" plus "a" , right parenthesis squared equals "a" squared 有圖檔。 要進行圖形閱讀，請按 Alt + T 鍵。x+10−a2+y+a2=a2
3
運算式 4: left parenthesis, "x" plus 10 minus "a" , right parenthesis squared plus left parenthesis, "y" plus 10 minus "a" , right parenthesis squared equals "a" squaredx+10−a2+y+10−a2=a2
4
運算式 5: left parenthesis, "x" plus "a" , right parenthesis squared plus left parenthesis, "y" plus 10 minus "a" , right parenthesis squared equals "a" squaredx+a2+y+10−a2=a2
