Christmas MT's answer to lana <3's Secondary 3 A Maths Singapore question.

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
Christmas MT
Christmas Mt's answer
3276 answers (A Helpful Person)
its a very similar question to the other 3, x^2-18 is still in the format of ax^2 + bx + c, you just need to see that b=0 in this case. it is still a quadratic eqn.