Beserta Caranya kakak sebisa Kaka aja ya...

2. (3x +2y)(9x^2 - 6xy + 4y^2)
= 3x ( 9x^2 -6xy +4y^2) + 2y (9x^2 - 6xy + 4y^2)
= 27x^3 - 18x^2y + 12xy^2 + 18xy^2 - 12xy^2 + 8y^3
= 27x^3 - 18x^2y + 18xy^2 + 8y^3

3. p = (3x +2 )
l = (x -1 )
luas = p × l
= (3x +2)(x -1)
= 3x^2 - 3x +2x -2
= 3x^2 - x -2