L3-4xl+l-yl при x=2.1 и y=0.4

Question

L3-4xl+l-yl при x=2.1 и y=0.4

Answer 1

|3-4×2,1|+|-0,4|=|3-8,4|+|-0,4|=|-5,4|+|-0,4|= 5,4+0,4=5,8