Bo dau ngoac roi rut gon bieu thuc : 

A= a .( 5-b) + b . ( a- 5) - (5a + 3b )

B = ( x-1 ) . (x-2) - ( x2 + x + 8  )

Bo dau ngoac roi rut gon bieu thuc :

a) - ( - 12 + 25 - 36 ) - ( 12 - 36 + 57 )

b) - ( 23 + 5 - 6 + 17 ) + ( 23 - 5 - 83 - 6 )

c) 12 . ( 6 - 7 - 8 ) - 10 . ( 11 + 12 - 13 )

Giup minh voi minh dang can rat gap

     Bo dau ngoac roi rut gon bieu thuc :

a) - ( -a + c - d ) - ( c- a + d )

b) - ( a + b - c + d ) + ( a - b - c - d )

c) a( b- c -d ) - a( b + c - d )

Giup minh nhe minh dang can gap

bo dau ngoac roi thu gon bieu thuc 

a( b-c ) - c(b-d) +a(c+d) +bc

Bo dau ngoac va thu gon bieu thuc:

a) (a+b)(2a+b)

b) (2a-b)(a-b)

c) (2a+b)(2a-b)

cho phan so a/b . Neu rut gon phan so a/b thi ta duoc phan so 3/4 . Neu cong them 15 don vi vao tu so roi rut gon thi duoc phan so 7/6. Tim phan so a/b

Khong dung may tinh bo tui .Rut gon roi quy dong cac phan so sau

a)\(\frac{17}{20},\frac{13}{15}va\frac{41}{60}\)

b)\(\frac{25}{75},\frac{17}{34}va\frac{121}{132}\)

bo dau ngoac roi tinh phan a 125-4 .[3-7.(-2)]

Doc doan trich sau

Bo em di cay ve

Doi sam

Doi chop

Doi ca troi mua...

Xac dinh cau rut gon trong doan tho?Hay khoi phuc lai cac cau rut gon ma em vua tim duoc

GIUP MINH VOI NGAY MAI MINH KIEM TRA ROI