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18 tháng 7 2018

a)  \(x^4+324=\left(x^2-6x+18\right)\left(x^2+6x+18\right)\)

c)  \(x^{13}+x^5+1=\left(x^2+x+1\right)\left(x^{11}-x^{10}+x^8-x^7+x^5-x^4+x^3-x+1\right)\)

d)  \(x^{11}+x+1=\left(x^2+x+1\right)\left(x^9-x^8+x^6-x^5+x^3-x^2+1\right)\)

e)  \(x^8+3x^4+4=\left(x^4+x^2+2\right)\left(x^4-x^2+2\right)\)

2 tháng 11 2018

\(x^8+3x^4+4\)

\(=x^8+4x^4+4-x^4\)

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

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

x^3y^4 + 64 = (x^(27y^4)+4)(x^(54y^4)-4x^(27y^4)+16)

4x^4y^4 + 1 = (2x^(128y^4)-2x^(64y^4)+1)(2x^(128y^4)+2x^(64y^4)+1)

32x^4 + 11 = ko biết 

x^4 + 4y^4 = (2y^2-2xy+x^2)(2y^2+2xy+x^2)

x^7 + x^2 + 11 = ko biết

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

x^8 + x^7 + 11 = ko biết 

21 tháng 8 2021

sai ak

16 tháng 12 2018

\(x^{11}+x^7+1\)

\(=\left(x^{11}-x^2\right)+\left(x^7-x\right)+\left(x^2+x+1\right)\)

\(=x^2\left(x^9-1\right)+x\left(x^6-1\right)+\left(x^2+x+1\right)\)

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

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

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

\(=\left(x^2+x+1\right)\left(x^9+x^6+x^3-x^8-x^5-x^2+x^5+x^2-x^4-x+1\right)\)

\(=\left(x^2+x+1\right)\left(x^9-x^8+x^6-x^4+x^3-x+1\right)\)

16 tháng 12 2018

\(x^7+x^2+1\)

\(=\left(x^7-x\right)+\left(x^2+x+1\right)\)

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

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

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

\(=\left(x^2+x+1\right)\left(x^5+x^2-x^4-x+1\right)\)

3 tháng 7 2019

\(x^8+3x^4+4\)

\(=\left(x^8-x^6+2x^4\right)+\left(x^6-x^4+2x^2\right)+\left(2x^4-2x^2+4\right)\)

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

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

3 tháng 7 2019

\(4x^4+4x^3+5x^2+2x+1\)

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

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

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

25 tháng 8 2020

a) x2 - 4y2 

= x2 - ( 2y )2

= ( x - 2y )( x + 2y )

b) x2 + x - 12

= x2 - 3x + 4x - 12

= x( x - 3 ) + 4( x - 3 )

= ( x - 3 )( x + 4 )

c) x2 + 2xy + y2 - 11

= ( x2 + 2xy + y2 ) - 11

= ( x + y )2 - ( √11 )2

= ( x + y - √11 )( x + y + √11 )

d) x4 + 1 

= ( x4 + 2x2 + 1 ) - 2x2

= ( x2 + 1 )2 - ( √2x )2

= ( x2 - √2x + 1 )( x2 + √2x + 1 )

25 tháng 8 2020

a) \(x^2-4y^2\)

\(=x^2-\left(2y\right)^2\)

\(=\left(x-2y\right).\left(x+2y\right)\)

b) \(x^2+x-12\)

\(=x^2+4x-3x-12\)

\(=\left(x^2+4x\right)-\left(3x+12\right)\)

\(=x.\left(x+4\right)-3.\left(x+4\right)\)

\(=\left(x+4\right).\left(x-3\right)\)

c) \(x^2+2xy+y^2-11\)

\(=\left(x^2+2xy+y^2\right)-11\)

\(=\left(x+y\right)^2-11\)

\(=\left(x+y\right)^2-\left(\sqrt{11}\right)^2\)

\(=\left(x+y-\sqrt{11}\right).\left(x+y+\sqrt{11}\right)\)