tìm lỗi sai

a) √1681=√1600+√81

b)√( -36) . (-81)=6.9

c) -(√3)^2=3

d)√169-144 = √169 - √144

e) (-√9)^2=3

f) - √( -7)^2= -7

giúp mik vs

write a short paragraph about your family lifestyle (80 words)

- x - 9/2004 = -1/2003 help

- x - 9/2004 = 1/2003

tìm x, biết: x- ( - 2/7 ) = -11/7

(x^3)^2 : (x^2)^3 với x khác 0

i need help

tìm x ,biết : (4/5-1/2x)^3=8/125

help me

C