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Ms Loh, the second question i think got problem leh :/ Like why is there even 3 different terms?

ReplyDelete-Lovy (Lazy to sign in to Blogger)

@Lovy

ReplyDeleteYou are referring to this question(?)

(2) Factorise: 8x^2 - xy - 7y^2

There are 3 terms. Did you notice that the middle term has both "x" and "y"?

Instead of just a constant, we have 7y^2.

So, now consider how we can write 7y^2 as a product of 2 factors (y and 7y)?

You may refer to the post (examples) just before this task:

(T3W10) Algebra: Factorisation (Quadratic Expressions involving more than one variable)