(-3/4)63x-1=(3/4)^3

3x-1=3+1

3x=3=1

x=4;3

x=4/3

Vậy x=4/3

25556

\(\Leftrightarrow x-5=-4\)

\(\Leftrightarrow x=-4+5=1\)

Vậy ...

(x - 5)³ = - 64

\(\Rightarrow\) (x - 5)³ = - 64 = (- 4)³

\(\Rightarrow\) x - 5 = - 4

\(\Rightarrow\) x = 1

Vậy x = 1

(x - 5)³ = -64

=> x - 5³ = -64

=> x - 125 = -64

=> x = -64 + 125

=> x = 61

\(\left(x+5\right)^3=-64=\left(-4\right)^3\\ Vậy:x+5=-4\\Vậy:x=-4-5=-9 \)

\(\left(x+5\right)^3=-64\)

\(\Rightarrow\left(x+5\right)^3=\left(-4\right)^3\)

\(\Rightarrow x+5=-4\)

\(\Rightarrow x=-4-5\)

\(\Rightarrow x=-9\)

Vậy: \(x=-9\)

(x-5)³=64=4³

=>x-5=4

=>x=4+5=9

        Vậy x=9

⇒x=un=u1+(n-1)d=1+7.2=15

Đáp án C.

a) \(\left(\frac{2x}{3}-3\right)\div\left(-10\right)=\frac{2}{5}\)

\(\Rightarrow\left(\frac{2x}{3}-\frac{9}{3}\right).-\frac{1}{10}=\frac{2}{5}\)

\(\Rightarrow\frac{2x-9}{3}.-\frac{1}{10}=\frac{2}{5}\)

\(\Rightarrow\frac{9-2x}{30}=\frac{2}{5}\Rightarrow\left(9-2x\right).5=60\)

\(\Rightarrow45-10x=60\Rightarrow-10x=15\Rightarrow x=-\frac{15}{10}=-1,5\)

b)\(\left(x+5\right)^3=64\)

\(\Rightarrow\left(x+5\right)^3=4^3\)

\(\Rightarrow x+5=4\Rightarrow x=-1\)

A, 2x/3-3=-4

2x/3=-1

2x=-3

X=-3/2

B,(x+5)^3=4^3

=> x+5=4

X=-1

k nha

b) x+5 =4

x=-1

\(a.\left(x+5\right)^3=-64\Leftrightarrow x+5=-4\Leftrightarrow x=-9\\ b.\left(2x-3\right)^2=9\Leftrightarrow\left[{}\begin{matrix}2x-3=3\\2x-3=-3\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=3\\x=0\end{matrix}\right.\) 

( Nhớ kết luận! )

a.

\(\left(x+5\right)^3=\left(-4\right)^3\)

\(\Leftrightarrow x+5=-4\)

\(\Leftrightarrow x=-9\)

b.

\(\left(2x-3\right)^2=3^2\)

\(\Leftrightarrow\left[{}\begin{matrix}2x-3=3\\2x-3=-3\end{matrix}\right.\)

\(\Leftrightarrow\left[{}\begin{matrix}2x=6\\2x=0\end{matrix}\right.\)

\(\Leftrightarrow\left[{}\begin{matrix}x=3\\x=0\end{matrix}\right.\)

\(\left(x+5\right)^3=\left(-4\right)^3\)

=-9

Vậy 

(9 không được)

\(\left(2x-3\right)^3=2^3\)

P/s Nhớ tick cho mình nha. Thanks bạn

\(\left(x+5\right)^3=-64\)

\(\Rightarrow\left(x+5\right)^3=\left(-4\right)^3\)

\(\Rightarrow x+5=-4\)

\(\Rightarrow x=-9\)

Vậy \(x=-9\)

Ta có: (x+5)³=-64

=> (x+5)³=(-4)³

=> x+5 = -4

=> x = -4-5

=> x = -9

Vậy x=-9

(x+5)^3=-4^3

=> x+5=-4

x=-4 -5

x=-9

mk trả lời như z có đúng ko?