Đáp án:
Giải thích các bước giải:
1. 2x³-8x=2x(x²-4)=2x(x-2)(x+2)
2. x²+2xz+2xy+4yz
=(x²+2xy)+(2xz+4yz)
=x(x+2y)+2z(x+2y)
=(x+2y)(x+2z)
3. 2x²-4x+2
=2(x²-2x+1)
=2(x-1)²
4. xz+xt+yz+yt
=x(z+t)+y(z+t)
=(z+t)(x+y)
5. 3x³+12x²+12x
=3x(x²+4x+4)
=3x(x+2)²
6. x²-2xy+tx-2ty
=x(x-2y)+t(x-2y)
=(x-2y)(x+t)
7. x³-2x²+x
=x(x²-2x+1)
=x(x-1)²
8. x²-2x²+x
=-x²+x
=-x(x-1)
9. 2xy+3z+6y+xz
=(2xy+6y)+(3z+xz)
=2y(x+3)+z(3+x)
=(x+3)(2y+z)