Can Brooklyn tech deny your entry into the school after you passed shsat?

No, Brooklyn Technical High School (Brooklyn Tech) cannot deny your entry after you've passed the Specialized High Schools Admissions Test (SHSAT) and have been offered a seat. Passing the SHSAT and meeting all other requirements *guarantees* admission to your chosen specialized high school, provided you accept the offer. They cannot revoke that offer unless there's been a demonstrable issue with the validity of your application (e.g., fraud).