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