Step-by-step explanation: It is 1462 Kilograms, why? When rounding the 6 in the tens place rounds the 4 up. Which leads to it being 1500 Kilograms. Hope this clears up your problem! :P
(x - 9)(x + 9) would give you x^2 - 81 when you get a plus and minus like that after you factor the middle term is canceled out so the answer would be (x - 9)^2
