Jevon Tan Jing Hong's answer to Ganney's Secondary 4 A Maths question.

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
Jevon Tan Jing Hong
Jevon Tan Jing Hong's answer
3 answers (A Helpful Person)
1st
use subsistuition method
Ganney
Ganney
6 years ago
Wow. Thanks! Didn't know there's a method for this. :)