Answer:
11ts + 4t^2 + 7t
Step-by-step explanation:
7st + 4t(s + t + 4) - 9t
= 7st + 4ts + 4t^2 + 16t - 9t
= 11ts + 4t^2 + 7t
Answer: 11st + 4t² + 7t
Step-by-step explanation:
Expand 4t(s + t + 4) into: 4st + 4t² + 16t
7st +4st + 4t² +16t - 9t
Add and subtract to get your answer
