Try Another Version of This Question Box 1: Enter your answer as a number (like 5, -3, 2.2172) or as a calculation (like 5/3, 2^3, 5+4) Box 2: Enter your answer as a number (like 5, -3, 2.2172) or as a calculation (like 5/3, 2^3, 5+4)
By completing the square, the expression `x^2-8 x +21` equals
` (x+A)^2+B`
where `A = `
and `B = `
Enter DNE for Does Not Exist, oo for Infinity -4
Enter DNE for Does Not Exist, oo for Infinity 5