[ (x2 + 54) - 32]. 2= 244
tìm x
Tìm x, biết:
a/ x 2 = y 3 và xy = 54
b / x − 1 2 = y − 2 3 = z − 3 4 và 2x + 3y –z = 50
c/ 3x = 2y; 7y = 5z và x – y + z = 32
câu a 88-3 (7+x) = 64
b, 131x-941=27x23
c, [(x+32)-17]x2 = 42
d , [ (x2+54)-32]:2=61
Bài 3 Tính số số hạng của dãy
1;5;9;.....;2005;2009
Bài 4 : Tính tổng :
9+12+15+...+2007+2010
ai dung se dc tick
1.Tính
a) 81 + 243+ 19
b) 2 x 25 x 2 x 16 x 4
c) 32 x 47 + 32 x 54 - 32
Bài giải
a, \(81+243+19=\left(81+19\right)+243=100+243=343\)
b, \(2\text{ x }25\text{ x }2\text{ x }16\text{ x }4=25\text{ x }4\text{ x }2\text{ x }2\text{ x }16=25\text{ x }8\text{ x }32=200\text{ x }32=6400\)
c, \(32\text{ x }47+32\text{ x }54-32=32\text{ x }\left(47+54-1\right)=32\text{ x }100=3200\)
a,81+19+243
=100+243
b,(2x25)x2x(16x4)
=50x2x64
=100x64
=6400
c,32x47+32x54-32x1
=32x(47+54-1)
=32x100
=3200
a,\(81+243+19=\left(81+19\right)+243\)
\(=100+243=343\)
b,\(2\times25\times2\times16\times4=\left(25\times4\right)\times\left(2\times2\times16\right)\)
\(=100\times64=6400\)
c,\(32\times47+32\times54-32=32\times47+32\times54-32\)
\(=\left(47+54-1\right)\times32\)
\(=3200\)
[ ( x + 54 ) - 32 ] x 2 = 244
[ ( x + 54 ) - 32 ] x 2 = 244
( x + 54 ) - 32 = 244 : 2 =122
x + 54 = 122 + 32 =154
x = 154 - 54 =100
=> (x+54)-32=244:2
=> (x+54)-32=122
=> x+54=122+32
=>x+54=154
=> x=154-54=100
t i c k cho mình nha cãm ơn
[ ( x + 54 ) - 32 ] x 2 = 244
( x + 54 ) - 32 = 244 : 2 =122
x + 54 = 122 + 32 =154
x = 154 - 54
x =100
[ ( x^2+54)-32]*2=244
tìm x [ ( x2+54)-32]*2=244
[(x^2+54)-32]*2=244
(x^2+54)-32=244/2
(x^2+54)-32=122
x^2+54=122+32
x^2+54=154
x^2=154-54
x^2=100
=> x=10 hoặc x=-10
[(x2+54)-32]*2=244
(x2+54)-32=244/2
(x2+54)-32=122
x2+54=122+32
x2+54=154
x2=154-54
x2=100=102
=>x=10
tìm x:
a,[ ( x+32)-17]*2=42
b,[ 61+(53-x)]*17=1785
c,[ ( x^2+54)-32 ] * 2=244
a) => (x+32) - 17 = 42:2 = 21
=> x+32 = 21+17 = 38
=> x=38-32=6
b) => 61+(53-x) = 1785:17=105
=> 53-x = 105-61=44
=> x = 53-44 =9
c) => x^2 +54 -32 = 244:2 = 122
=> x^2 +22 = 122
=> x^2 = 122-2=100
=> x= 10 hoặc -10
giải oy pn **** giùm mk nka
a) (x – 2)(x2 + 2x + 4) – x( x2 +2) = 12 b) (x – 3)2 – (x+2)(x–2) = 16
c) x3 – 9x = 0 d) x3 – 6x2 + 9x – 54 = 0
giúp e vs ạ
\(a,\Leftrightarrow x^3-8-x^3-2x=12\Leftrightarrow-2x=20\Leftrightarrow x=-10\\ b,\Leftrightarrow x^2-6x+9-x^2+4=16\Leftrightarrow=-6x=3\Leftrightarrow x=-\dfrac{1}{2}\\ c,\Leftrightarrow x\left(x^2-9\right)=0\\ \Leftrightarrow x\left(x-3\right)\left(x+3\right)=0\Leftrightarrow\left[{}\begin{matrix}x=0\\x=3\\x=-3\end{matrix}\right.\\ d,\Leftrightarrow x^2\left(x-6\right)+9\left(x-6\right)=0\\ \Leftrightarrow\left(x^2+9\right)\left(x-6\right)=0\\ \Leftrightarrow x=6\left(x^2+9>0\right)\)
[(46 - 32)^2 - (54 - 42)^2] . 2 . x - 1872 = 0
[ ( 46 - 32 ) ^2 - ( 54 - 4 . 2) ^2 . x - 1872 = 0