\(2x^2=18\)
\(x^2=18:2\)
\(x^2=9\)
\(x^2=3^2\)
\(x=3\)
\(=>x^2=9< =>\left[{}\begin{matrix}x=3\\x=-3\end{matrix}\right.\)
\(2x^2=18\)
\(x^2=18:2\)
\(x^2=9\)
\(x^2=3^2\)
\(x=3\)
\(=>x^2=9< =>\left[{}\begin{matrix}x=3\\x=-3\end{matrix}\right.\)
Tìm x, biết: 1 2.4 + 1 4.6 + ... + 1 ( 2 x − 2 ) .2 x = 1 8 ( x ∈ N , x ≥ 2 )
( 2x - 1 )2 + 17 = 18
a) 2x - 261 = -21
b) 15 . (-2) - x = 45
c) -18 + ( 7 - x)^2 = -2
d) ( 2x - 1 ) chia hết ( x +1)
86;[2.(2x-2)-7]+16=18
Thực hiện phép tính:
A=5x(2^2x3^2)^9x(^*2)^6-2x(2^2x3)^14x3^4 / 5x2^28x3^18-7x2^29x3^18
tìm x và y
x.y=18
(x+2).(y-1)=4
(2x+1).(y-1)=10
22x.3y=12
2x.3y=18
Tìm số tự nhiên x, biết:
a) 18-(2x+5)=9
b) 23x-4 = 32
c) (3x+2)2 =64
d) x(2x - 12) = 0
Tìm x biết 1/2x + 2/3( 2x - 4 ) - 4/5 + x - 18 = 0
a)|18-2x|=18
b)|1-x|=1-x
c)|x-2|=2-x
d)|x-2|=|3x+6|
(2x + 1) x (y + 2) = 18