1) (d+13)(2d-1) = 2d^2 + 26d - d - 13 = 2d^2 + 25d - 13
2) (3y-5)(2y-12) = 6y^2 - 36y - 10y + 60 = 6y^2 - 46y + 60
3) (5x-y)(2x^2 + xy - 3y^2) = 10x^3 + 5x^2y - 2xy^2 - 5x^2y - xy^2 + 3y^= 10x^3 - 3xy^2 + 3y^3
1) (d+13)(2d-1) = 2d^2 + 26d - d - 13 = 2d^2 + 25d - 13
2) (3y-5)(2y-12) = 6y^2 - 36y - 10y + 60 = 6y^2 - 46y + 60
3) (5x-y)(2x^2 + xy - 3y^2) = 10x^3 + 5x^2y - 2xy^2 - 5x^2y - xy^2 + 3y^
= 10x^3 - 3xy^2 + 3y^3