PhysChemTutor's answer to Leng's Secondary 3 A Maths Singapore question.

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
PhysChemTutor
Physchemtutor's answer
1551 answers (A Helpful Person)
1st
Leng
Leng
3 years ago
THX