
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.

TÌM X
a,\(\left(x-\frac{1}{2}\right)^3=\frac{1}{27}\)
b, \(\left(x-\frac{1}{2}\right)^2=\frac{4}{25}\)

\(\left(x-\frac{1}{2}\right)^3=\frac{1}{27}=\left(\frac{1}{3}\right)^3\)
\(\Leftrightarrow x-\frac{1}{2}=\frac{1}{3}\)
\(\Leftrightarrow x=\frac{1}{3}+\frac{1}{2}\)
\(\Leftrightarrow x=\frac{5}{6}\)
Bài làm
a) \(\left(x-\frac{1}{2}\right)^3=\frac{1}{27}\) b) \(\left(x-\frac{1}{2}\right)^2=\frac{4}{25}\)
=> \(\left(x-\frac{1}{2}\right)^3=\left(\frac{1}{3}\right)^3\) => \(\left(x-\frac{1}{2}\right)^2=\left(\frac{2}{5}\right)^2\)
=> \(x-\frac{1}{2}=\frac{1}{3}\) => \(x-\frac{1}{2}=\frac{2}{5}\)
\(x=\frac{1}{3}+\frac{1}{2}\) \(x=\frac{2}{5}+\frac{1}{2}\)
\(x=\frac{2}{6}+\frac{3}{6}\) \(x=\frac{4}{10}+\frac{5}{10}\)
\(x=\frac{5}{6}\) \(x=\frac{9}{10}\)
Vậy \(x=\frac{5}{6}\) Vậy \(x=\frac{9}{10}\)
# Chúc bạn học tốt #

\(\left(\frac{x}{10}-\frac{2}{3}\right)^2-\frac{1}{25}=0\)
\(\Leftrightarrow\left(\frac{x}{10}-\frac{2}{3}\right)^2=\frac{1}{25}\)
\(\Leftrightarrow\left(\frac{x}{10}-\frac{2}{3}\right)^2=\left(\pm\frac{1}{5}\right)^2\)
\(\Leftrightarrow\orbr{\begin{cases}\frac{x}{10}-\frac{2}{3}=\frac{1}{5}\\\frac{x}{10}-\frac{2}{3}=-\frac{1}{5}\end{cases}}\)
\(\Leftrightarrow\orbr{\begin{cases}x=\frac{26}{3}\\x=\frac{14}{3}\end{cases}}\)

GIẢI
( x + 1/5 ) ^2 - 9/25 = 0
( x + 1/5 ) ^2 = 0 + 9/25
( x + 1/5 ) ^2 = 9/25
( x + 1/5 ) ^2 = ( 3/5 )^2
x + 1/5 = 3/5
x = 3/5 - 1/5
x = 2/5
HỌC TỐT ^_^

a) \(\left(x+\frac{1}{4}\right)^2+\frac{11}{25}=\frac{18}{25}\)
\(\Rightarrow\left(x+\frac{1}{4}\right)^2=\frac{7}{25}\)
\(\Rightarrow\) Không có x
Tìm x
\(a,2x-25\%=\frac{1}{2}\)
\(b,\left(\frac{3x}{7}+1\right).\left(-0,25\right)=\frac{-1}{28}\)
\(\)


bài này dễ mà
phân tích thành A2-b2=0
Rồi (a+b)(a-b)=0
rồi tính tiếp
Giải thích rõ ràng nha mấy bạn, mình ngu lắm nên nếu ko giải thích rõ mình sẽ ko hiểu được đâu.

a,ĐK : x \(\ne\)3/7
\(\frac{24}{7x-3}=-\frac{4}{25}\Leftrightarrow600=-28x+12\Leftrightarrow-28x=588\Leftrightarrow x=-21\)
b, ĐK : x;y \(\ne\)6
Xét : \(\frac{4}{x-6}=-\frac{12}{18}\Leftrightarrow72=-12x+72\Leftrightarrow x=0\)
Xét : \(\frac{y}{24}=-\frac{12}{18}\Leftrightarrow18y=-288\Leftrightarrow y=-16\)
\(\frac{24}{7.x-3}=-\frac{4}{25}\)
24.25=7.x-3.-4
600=7.x-3.-4
7.x-3.-4=600
7.x-3=600:-4
7.x-3=-150
7.x=-150+3
7.x=-147
x=-147:7
x=-21
vậy x=-21