Use FOIL method...
1. (x^2 + 2xy + y^2)(x+1)
x^3 + 2x^2y + xy^2 + x^2 + 2xy + y^2
Add Like Terms
There are no like terms.
2. x^3 + x2 +2x2y +xy2 + y2 + 2xy
3. (6x -8)(2x -3)
4. (-2x – 1) (9x +2)
5. (2x^2 - 4xy + 2y^2) (3x-4)
6. 6x^3 – 12x^2y + 6xy^2 – 8x^2 + 16xy-8y^2