Sửa lại câu d) là `25y^2`

`a)x^3-1`

`=(x-1)(x^2+x+1)`

`b)8x^3-y^3`

`=(2x)^3-y^3`

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

`c)x^2-8x+16`

`=x^2-2.x.4+4^2`

`=(x-4)^2`

`d)25y^2-1`

`=(5y)^2-1`

`=(5y-1)(5y+1(`

`e)27-8y^3`

`=3^3-(2y)^3`

`=(3-2y)(9+6y+4y^2)`

`f)2x^2-8x+8`

`=2(x^2-4x+4)`

`=2(x-2)^2`

a) x³ - 1 = x³ - 1³

              = (x - 1)(x² - x + 1)

b) 8x³ - y³ = (2x)³ - y³

                 = (2x - y)(4x² + 2xy + y²)

c) x² - 8x + 16 = x² - 2.4x + 4²

                        = (x - 4)²

d) đề có bị sai không , nên mình sưa lại đề nhé :

       25y² - 1 = (5y)² - 1²

                     = (5y - 1)(5y + 1)

e) 27 - 8y³ = 3³ - (2y)³

                  = (3 - 2y)(9 + 6y + 4y²)

f) 2x² - 8x + 8 = 2(x² - 4x + 4)

                       = 2(x - 2)²

 Chúc bạn học tốt

a: \(x^4-2x^3+x^2-2x\)

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

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

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

b: \(x^4+x^3-8x-8\)

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

\(=x^3\left(x+1\right)-8\left(x+1\right)\)

\(=\left(x+1\right)\left(x^3-8\right)\)

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

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

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

\(C=54x^3-16y^3=2\left(27x^3-8y^3\right)=2\left(3x-2y\right)\left(9x^2+6xy+4y^2\right)\)

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

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

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