I need a equation best anwser i will mark brainliest

Your best friend told you that last week scientists disco y that las vegas is responsible for abrupt climate changes. which do you think is best way to research that recent discovery? an encyclopedia usgs internet site a book in the library your best friend’s parents for your ! ❤️

Write the factored form of this trinomial 9x^2+18x-7

Iknow the answer but the calculator doesn't seem to give the right one