X8 LÀ X MŨ 8 HAY X*8 VẬY BẠN

a) x = 3

b) x = -2

c) x= -8

d) x = -10

e) x= 8 hoặc x = -8

f) x = 11 hoặc x = -11

Ta có 1x2x3x...x9-1x2x3x...x8=1x2x3x...x8x8

Mà 1x2x3x...x8x8-1x2x3x...x8x8=0 

Suy ra 1x2x3x...x9-1x2x3x...x8-1x2x3x...x8x8=0

a: \(x^4+4=\left(x^2-2x+2\right)\left(x^2+2x+2\right)\)

b: \(x^8+x^7+1\)

\(=x^8+x^7+x^6-x^6-x^5-x^4+x^5+x^4+x^3-x^3-x^2-x+x^2+x+1\)

\(=\left(x^2+x+1\right)\left(x^6-x^4+x^3-x+1\right)\)

c: \(x^8+x^4+1\)

\(=\left(x^8+2x^4+1\right)-x^4\)

\(=\left(x^4-x^2+1\right)\cdot\left(x^4+x^2+1\right)\)

\(=\left(x^4-x^2+1\right)\left(x^2+1-x\right)\left(x^2+1+x\right)\)

a)\(x^4+4\\ =\left(x^2\right)^2+4x^2+4-4x^2\\ =\left[\left(x^2\right)^2+4x^2+4\right]-\left(2x\right)^2\\ =\left(x^2+2\right)^2-\left(2x\right)^2\\ =\left(x^2+2+2x\right)\left(x^2+2-2x\right)\)

=>6x+300=8x-400

=>-2x=-700

=>x=350

X x 5 x8+146-69=???

kết quả là mấy vậy bạn

(14,28 - x) = 88,24 : 8 

14,28 - x = 11,03

x = 14,28 - 11,03

x = 3,25 

\(\Leftrightarrow14,29-x=88,24:8\)

\(\Leftrightarrow14,29-x=11,03\)

\(\Leftrightarrow x=14,29-11,03\)

\(\Leftrightarrow x=3,26\)

Xx8=16

X=16:8

X=2

x = 16 :8

x=2

X x 8 = 16

X      =   16 : 8

X      =    2

ủng hộ mk nha cảm ơn những ai duyệt cho mk ☻☻☻

x x 8=16

x=16:8

x=2