(m+2) 2 represents the square of a number. When m= 1, 3, 5, 7, ... odd, (m+2) 2 is odd, odd plus an even or odd, so Xiao Ming's discovery is wrong.

When m=-2, (m+2) 2 = 0, (m+2) 2+4 = 0+4 = 4.

New discovery m? +4m+8 cannot be less than 4.

(m+2)^2>； =0,,(m+2)^2+4>； =(0+4)