\(\left|2x+3\right|-x=1\)
\(\Leftrightarrow\orbr{\begin{cases}2x+3=x+1\\2x+3=-x-1\end{cases}}\)
\(\Leftrightarrow\orbr{\begin{cases}2x-x=1-3\\2x+x=-1-3\end{cases}}\)
\(\Leftrightarrow\orbr{\begin{cases}x=-2\\3x=-4\end{cases}}\)
\(\Leftrightarrow\orbr{\begin{cases}x=-2\\x=-\frac{4}{3}\end{cases}}\)
Cho bieu thuc :
C = ( 1 - 3x ) . x - 2x . ( x - 1 ) + 8
a ) Thu gon C
b ) Tinh gia tri bieu thuc voi x = -3
c ) Tim x de C = 8
d ) Tim ngiem cua C
dau . la dau nhan nha cac bn
nhanh nhanh nha mk dang can gap
Thu gon bieu thuc:
E=|x-3|+|x2+1|-x (x-1)
rut gon bieu thuc 2ax^2-a(1+2x^2)-[a-x(x+a)]
1 rut gon bieu thuc ; A=5Ix+1I-3.[4-2x]
Cho x/a =y/b =z/c va a b c x y z khac 0 rut gon bieu thuc b = ( a^2x + b^2y + c^2z ) / x^3 +y^3+z^3
thu gon bieu thuc A=(1-1/1+2)*(1-1/1+2+3)...(1-1/1+2+3+...+2016)
rut gon bieu thuc sau
A=5x-2-/2x+1/
thu gon va tim bac cua don thuc 2xy(1/2x^2yz)
ai giup mk voi
Rut gon bieu thuc ( 2x like )
a)28^15 . 3^17
_____________
84^16
b) 3^10 + 6^2
________________
5.3^8 + 20
