mathematics
posted by prince .
what value of k makes the given expression a perfect square?M square 8m+k

m^2  8 m + k
(mx)(mx) = m^2 2 x m + x^2
so
2 x = 8
x = 4
x^2 = 16 = k
so
m^2  8 m + 16
in general to complete the square
1 x^2 + b x + c
if that is to be a perfect square
c = (b/2)^2