\(\sqrt{0,25b^4}\)
\(=\sqrt{\left(0,5\right)^2.b^4}\)
\(=\sqrt{\left(0,5.b^2\right)^2}\)
\(=0,5.b^2\)
Tham khảo nhé~
\(\sqrt{0,25b^4}\)
\(=\sqrt{\left(0,5^2\right).b^4}\)
\(=\sqrt{\left(0,5.b^2\right)^2}\)
\(=0,5.b^2\)
Nguồn: Kudo shinichi
có mỗi 1 câu thôi mà; \(\sqrt{0,25b^4}=\sqrt{\left(0,5b^2\right)^2}=0,5b^2\)