Question

[ (x-1)² + (0-4)² ]

Answer 1

$\ [ (x - 1)^2 + (0 - 4)^2\ ] \\ \\ \ [ (x - 1)*(x - 1) + (0 - 4)(0 - 4)\ ] \\ \\ \ [ (x^2 - x - x + 1) + 16 \ ] \\ \\ x^2 - 2x + 1 + 16 \\ \\ => x^2 - 2x + 17$