(x+7)(x-2) = x^2 - 2x + 7x - 14= x^2 + 5x - 14
(4c-b)(6c+3b) = 24c^2 + 12bc - 4bc - 2b^2= 24c^2 + 8bc - 2b^2
(y+5)(y²-3y+8) = y^3 - 3y^2 + 8y + 5y^2 - 15y + 40= y^3 + 2y^2 - 7y + 40
(x+7)(x-2) = x^2 - 2x + 7x - 14
= x^2 + 5x - 14
(4c-b)(6c+3b) = 24c^2 + 12bc - 4bc - 2b^2
= 24c^2 + 8bc - 2b^2
(y+5)(y²-3y+8) = y^3 - 3y^2 + 8y + 5y^2 - 15y + 40
= y^3 + 2y^2 - 7y + 40