Bryant Lam Hong Sheng's answer to Koh Yun Zhen's Secondary 3 A Maths question.

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
Bryant Lam Hong Sheng
Bryant Lam Hong Sheng's answer
97 answers (Tutor Details)
1st
Solved part (a) using differentiation. Can be solved by b^2 - 4ac method as well. See photo 2 for part (c) and (d)