Expression 2: left parenthesis, "x" , right parenthesis Superscript, 2 , Baseline plus left parenthesis, "y" minus 5 plus "k" , right parenthesis Superscript, 2 , Baseline less than or equal to 5 squared left brace, "y" less than or equal to 5 minus "k" , right bracex2+y−5+k2≤52y≤5−k
2
Expression 3: left parenthesis, "x" , right parenthesis Superscript, 2 , Baseline plus left parenthesis, "y" plus 5 minus "k" , right parenthesis Superscript, 2 , Baseline less than or equal to 5 squared left brace, "y" greater than or equal to "k" minus 5 , right bracex2+y+5−k2≤52y≥k−5
3
Expression 4: left parenthesis, "x" , right parenthesis Superscript, 2 , Baseline plus "y" Superscript, 2 , Baseline equals left parenthesis, 5 minus "k" , right parenthesis squaredx2+y2=5−k2