(x-10)(x-22)=1234
thuc hien phep tinh bang cach nhanh nhat ( ko dung may tinh )
22^2008-2^2007-2^2006-...-2^2-2-1
Tinh bang cach hop li
-1911-(1234-1911)
CMR:2^1234+3^4321+3 chia hết cho 22
(7-x).(2019.2019.1024.12465.465768.97868.4464.9808087.5456.4.4533)=0
x bang may
tính hợp lí
-1911-(1234-1911)
32.(-39)+16.(-22)
-1911-(1234-1911)
156.72+28.156
32.(-39)+16.(-22)
-1945-(567-1945)
184.33+67.184
44.(-36)+22.(-28)
(x+1)+(x+3)+(x+5)+...+(x+81)=0 vay x bang may
1) (-1005).(x cong 2 ) bang 0
2) x cong x cong x cong 91 bang -2
3) / 5x cong 1/ bang 11
( thong cam nha , may mik k viet dc dau cong vs bang )
mik dg gap , giup mik nhe !
