Question

if x =2 and y=1 then x2+2xy+y2

Answer 1

$x = 2 \: \: \: \: \: \: \: \: \: y = 1 \\ \\ 2 \times 2 + 2 \times 2 \times 1 + 1 \times 2 \\ 4 + 4 + 2 \\ 10$