=(441.14.125):42875.6=(6174.125):42875.6=771750:42875.6=18.6=108

giúp mình mình

\(\frac{1}{4}+\left(2x-1\right)^3=0,125\\ \)

\(\frac{1}{4}+\left(2x-1\right)^3=\frac{1}{8}\\ \)

\(\left(2x-1\right)^3=\frac{1}{8}-\frac{1}{4}\)

\(\left(2x-1\right)^3=\frac{-1}{8}\)

\(\left(2x-1\right)^3=\left(\frac{1}{2}\right)^3\)

\(2x-1=0,5\)

\(2x=0,5+1\)

\(2x=1,5\)

\(x=0,75\)

Bài này mk làm chi tiết nên hơi dài, bạn có thể làm gọn lại

bài đó mk làm sai nha giờ mk làm lại

\(\frac{1}{4}+\left(2x-1\right)^3=\frac{1}{8}\)

\(\left(2x-1\right)^3=\frac{1}{8}-\frac{1}{4}\)

\(\left(2x-1\right)^3=\left(\frac{-1}{2}\right)^3\)

\(2x-1=\frac{-1}{2}\)

\(2x=0,5+1\)

\(2x=0.5\)

\(x=0,25\)

b)

\(\frac{21^2.14.125}{35^3.125}=\frac{\left(3.7\right)^2.7.2.5^3}{\left(7.5\right)^3.5^3}=\frac{3^2.7^2.7.2}{7^3.5^3}=\frac{3^2.2}{1.5^3}=\frac{9.2}{1.125}=\frac{18}{125}.\)

Chúc bạn học tốt!

A = \(\dfrac{21^2.14.125}{35^5.6}\)

= \(\dfrac{\left(3.7\right)^2.\left(2.7\right).5^3}{\left(5.7\right)^5.\left(2.3\right)}\)

= \(\dfrac{3^2.7^2.2.7.5^3}{5^5.7^5.2.3}\)

= \(\dfrac{3^2.7^3.2.5^3}{5^5.7^5.2.3}\)

= \(\dfrac{3}{5^2.7^2}\)

= \(\dfrac{3}{35^2}\)

@Pham Thi Thu Trang

B = \(\dfrac{2^{10}.13+2^{10}.65}{2^8.104}\)

= \(\dfrac{2^{10}\left(13+65\right)}{2^8.104}\)

= \(\dfrac{2.78}{104}\)

= \(\dfrac{3}{2}\)

@Pham Thi Thu Trang

C = \(\dfrac{7^{13}+7^5}{7^{10}+7^2}\)

= \(\dfrac{7^5\left(7^8+1\right)}{7^2\left(7^8+1\right)}\)

= 7³
@Pham Thi Thu Trang

(-212)-(57-212)

=-212-57+212

=(-212+212)-57

=0-57

=-57

(-212)-(57-212)

=(-212)-57+212

=[(-212)+212]-57

=0-57

=-57

a) -3 b) -57  c) 12 d) -100