a) \(\left(x-5\right)\left(2x-3^2\right)=0\)

\(\Rightarrow\left[{}\begin{matrix}x=5\\2x=9\end{matrix}\right.\)\(\Rightarrow\left[{}\begin{matrix}x=5\\x=\dfrac{9}{2}\end{matrix}\right.\)

b) \(2\left(3x-15\right)\left(5-x\right)=0\)

\(\Rightarrow6\left(x-5\right)\left(5-x\right)=0\Rightarrow x=5\)

(x - 5)(2x - 3²) = 0

=> \(\left[\begin{array}{} x - 5 = 0\\ 2x - 3^{2} = 0 \end{array} \right.\)=> \(\left[\begin{array}{} x = 0 - 5 = -5\\ 2x = 0 - 3^{2} = 0 - 9 = -9 => x = \dfrac{9}{2} \end{array} \right.\)

b) 2(3x - 15)(5 - x) = 0

      (6x - 30)(5 - x) = 0

=> \(\begin{cases} 6x - 30 = 0\\ 5 - x =0 \end{cases} \) => \(\begin{cases} 6x = 0 + 30 = 30 => x = 5\\ x = 0 + 5 = 5 \end{cases} \)

\(\Leftrightarrow x-\left[3-x+3+x-2\right]=0\)

=>x=4

(2x+5):4-(32+16.3:6-15)=0

(2x+5):4-25=0

(2x+5):4     =0+25

(2x+5):4     =25

(2x+5)        =25:4

2x+5          =6,25

2x              =6,25-5

2x              =1,25

x                =1,25:2

x                =0,625

các bạn nhớ k cho mình nha

(2x + 5 ): 4 - ( 32 + 16.3 : 6 - 15 ) = 0

(2x + 5 ) : 4 - ( 32 + 48 : 6 - 15 ) = 0

(2x + 5 ) : 4 - ( 32 + 8 - 15 ) = 0

(2x + 5) : 4 - 25 = 0

(2x + 5) : 4 = 0 + 25

(2x + 5 ) : 4 = 25

2x + 5 = 25 x 4

2x + 5 = 100

2x = 100 - 5

2x = 95

=> x = 95 : 2 = 47,5 

x=6 hoặc -6

x=3 hoặc x=-3

9-\(X^2\)=0

9-\(X^2\)=0:2

9-\(X^2\)=0

X=0+9

X=9

9=3.3

=\(3^2\)

VẬY X=3

MIK LM KO LOGIC CHO LẮM ĐÂU

\(\left(3x-2\right)^2-6x+4=0\\ =>\left(3x-2\right)^2+2\left(-3x+2\right)=0\\ =>\left(2-3x\right)^2+2\left(2-3x\right)=0\\ =>\left(2-3x\right)\left(2-3x+2\right)=0\\ =>\left(2-3x\right)\left(4-3x\right)=0\\ \)

=> 2-3x=0 hoặc 4-3x=0

Nếu 2-3x=0 thì 3x=2 => \(x=\dfrac{2}{3}\)

Nếu 4-3x=0 thì 3x=4 => \(x=\dfrac{4}{3}\)

Vậy \(x=\dfrac{2}{3},x=\dfrac{4}{3}\)

x + 10 - (32 + 48 : 6 - 15) = 0

x + 10 - (32 + 8 - 15)       = 0

x + 10 - 25                     = 0

x                                   = 0 + 25 - 10

x                                  =15

bay gio mk ranh rui mk lam cho

x+5.2-(32+16.3:6-15)=0

x+5.2-(32+48:6-15)   =0

x+5.2-(32+6-15)        =0

x+5.2-(38-15)            =0

x+5.2-23                   =0

x+10-23                    =0

x+10                         =0+23

x+10                         =23

                              x=23-10

                              x=13

chuc bn hoc gioi!

x+5.2-(32+16:3x6-15)=0

=> x+ 5+10-(32:32-15)=0

=> x+ 15- (-14)=0

=>x+15 +14=0

=> x= 0-14-15

=>x= -29

5.2 là 5 nhân 2 hay 5 phẩy 2

x+5,2-(32+16.3:16-5)=0

(=)x+5,2-30=0

(=)x+5,2=30

x=24,8

chúc bạn học tốt ^_^

\(\Rightarrow\left[{}\begin{matrix}x+2=0\\x-4=0\end{matrix}\right.\Rightarrow\left[{}\begin{matrix}x=-2\\x=4\end{matrix}\right.\)

\(\Leftrightarrow\left\{{}\begin{matrix}x+2=0\\x-4=0\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}x=-2\\x=4\end{matrix}\right.\)

25 nhé bạn

ý lộn 15 nhé bạn

a)\(\left(x-140\right)\)\(\div\)7=27-4-3 =20\(\Rightarrow\)    \(\left(x-140\right)\) =20x7=140\(\Rightarrow\) x=0