Răspuns:
Explicație pas cu pas:
128×87√(1246:54)=2^7·87·√2·7·89:2:27=2^7·87·√623:3³=2^7·3^(-1)·89√623
There are a few mistakes with your numbers and that's why it has no point.
But you must know some rules working with exponents.
a^m·a^n=a^(m+n)
a^m:a^n=a^(m-n)
√a=a^1/2
a^(-1)=1/a
(a^m)^n=a^m·n
