18 x 3+ 18x4 + 18x3

= 18 x ( 3+4+3)

=18  x     10

= 180 

18.3+18.4+18.3

= 18 ( 3 + 4 + 3 )

=18.10

=180 .

k nha

1,8 x ( 3 + 4 + 3 )

=1,8 x 10

= 18

tk nhé

24 x 2 = 48.

Đúng 100% luôn!

Ai tk cho mình mình tk lại.

48 nha

24 x 2 = 48

24 x2= 48

24x2=48

chắc sai rồi bạn ơi

79x54+54x38-18x3

=54x(79+38) - 18x3

kết quả bạn tự tính nha mk ko biết có đúng hay ko

79x54+54x38-18x3

= 79x54+54x38-54

=54x(79+38-1)

=54x116

=6264

79 x 54 + 54 x 38 - 18 x 3

= 79 x 54 + 38 x 54 - 54 x 1

= ( 79 + 38 - 1 ) x 54 

= 116 x 54

= 16 + 100 x 54

= 16 + 5400

= 5416

\(79\cdot54+54\cdot38-18\cdot3\)

\(=79\cdot54+54\cdot38-54\cdot1\)

\(=54\cdot\left(79+38-1\right)\)

\(=54\cdot116\)

\(=6264\)

 18 x 3 + 11230 x 4

= 54 + 44920

= 44974

24x(5+3+2)

=24x10

=240

240 nhé

240

\(=-12x^2\left(y-x\right)+18x^3\left(y-x\right)\)

\(=-6x^2\left(y-x\right)\left(2-3x\right)\)

(24x54-44x24):(49-24x2)

=24x(54-44):(49-48)

=24x10:1

=240:1

=240

(24x54-44x24):(49-24x2)

= 24x(54-44): (49-48)

= 24x10: 1

= 240:1

= 240

ủng hộ nha

a) ( a+18) x 3 : 6 + 70 = 130

( a+ 18) x 3 : 6 = 130 - 70 = 60

( a+18) x 3 = 60 x 6 =360

a + 18 = 360 : 3 = 120

a = 120 - 18 =102

b) ( a + 18 x 3) : 6 + 70 = 130

( a+ 18 x 3)  : 6 = 130 - 70 =60

a + 18 x 3 = 60 x 6 = 360

a + 18 = 360 : 3 = 120

a = 120 - 18 = 102

thank bạn

bhtd 

\(=6\left(4x^2-9y^2+6y-1\right)\)

\(=6\left[\left(2x\right)^2-\left(3y-1\right)^2\right]\)

\(=6\left(2x-3y+1\right)\left(2x+3y-1\right)\)

\(24x^2+36y-54y^2-6\)

\(=6\left(4x^2+6y-9y^2-1\right)\)

\(=6\left[4x^2-\left(9y^2-6y+1\right)\right]\)

\(=6\cdot\left[\left(2x\right)^2-\left(3y-1\right)^2\right]\)

\(=6\left(2x-3y+1\right)\left(2x+3y-1\right)\)