Why do square numbers not end in 2, 3, 7 or 8. Why is it so that to identify whether a number is a square or not you look at the last digit of the number.

I don't know dear

I am Korean can you tell in Korean language

idk

step-by-step explanation:

for this pair of functions g(x)=x-2 and f(x)=|x| is (g o f)(a)= |a| -2

step-by-step explanation:

g(x)=x-2

f(x)=|x|

(g o f)(a)=?

(g o f)(x)=g(f(x))

(g o f)(x)=g(|x|)

(g o f)(x)=|x|-2

(g o f)(a)=|a|-2