\(8^{x+3}+2^{3x}-2^9=2^{18}\)
\(2^{3\left(x+3\right)}+2^{3x}-2^9=2^{18}\)
\(2^{3x+9}+2^{3x}=2^{18}+2^9\)
\(2^{3x}\left(2^9+1\right)=2^9\left(2^9+1\right)\)
\(2^{3x}=2^9\)
\(\Rightarrow3x=9\)
\(x=9:3\)
\(x=3\)
\(8^{x+3}+2^{3x}-2^9=2^{18}\)
\(2^{3\left(x+3\right)}+2^{3x}-2^9=2^{18}\)
\(2^{3x+9}+2^{3x}=2^{18}+2^9\)
\(2^{3x}\left(2^9+1\right)=2^9\left(2^9+1\right)\)
\(2^{3x}=2^9\)
\(\Rightarrow3x=9\)
\(x=9:3\)
\(x=3\)
tìm x
a) 5. (x – 1)3 = 40
b) 3x + 1 + 9x = 324
c) 5x – 13 = 3.22
d) 8x + 23x + 1 = 192
29x(23+15)- 23x(29+15)
phân tích đa thức thành nhân tử
a)35x2 +36x-20
b)3a4-8x2-35
c) 8x2-23x--3
Tính hợp lí :
1)-56+8x(11+7)
2)47x(23+50)-23x(47+50)
Cho f (x)= (30x3-3x2-6x-20)2013*(23x+5x-29)2012.Sau khi thu gon thi tong he so f (x) la bao nhieu
Tính nhanh :
a) 171 - [ - 29 - ( - 218 - 72 )]
b) 25 . 2² + ( - 19 + 3² ) - 100
Đầy đủ cách làm :3
tìm x
218 - (x+31)=x - 29
218-(x + 31) = x - 29
Tìm số nguyên x .
Tìm x:
218 - (x +31) = x - 29
Giúp vs ạ@@
Mơn @@
8x - 24= 29 : 26