A) p(p+4)-(p-2)(p+6) = p^2+4p - (p^2+6p-2p-12) = p^2+4p - (p^2-4p-12) = p^2+4p - p^2+4p+12 = 8p+12
B) (2y-1)^2 + (2y+1)(2y-1) = 4y^2 - 4y + 1 + (4y^2 - 2y - 2y + 1) = 4y^2 - 4y + 1 + 4y^2 - 4y + 1 = 8y^2 - 8y + 2
A) p(p+4)-(p-2)(p+6) = p^2+4p - (p^2+6p-2p-12) = p^2+4p - (p^2-4p-12) = p^2+4p - p^2+4p+12 = 8p+12
B) (2y-1)^2 + (2y+1)(2y-1) = 4y^2 - 4y + 1 + (4y^2 - 2y - 2y + 1) = 4y^2 - 4y + 1 + 4y^2 - 4y + 1 = 8y^2 - 8y + 2