Fractions

Q)

A)

Do note that -1-m must be changed to -(1+m) so that we are able to further simplify the fraction.

More Questions Answered

Here are more questions from one of my Sec 2 students.


Q)

A)

Do note that you can only flip the fractions when there is only a single fraction on either sides of the '=' sign (step 3-4)

Q)

A)

This is a simple enough question, just take note that using 22/7 for pi offers a higher accuracy than using 3.14.

First post

This is a sec 2 question on algebraic manipulation.

Q)

For this question, the important thing to note is that we generally have to simplify by factorization
before we can continue to multiply the 2 fractions together. This applies for many questions of this form.

A)

Do note that a(x-y)+b(x-y) can be simplified into (a+b)(x-y),
just like how 2(x+y)+3(x+y) = (2+3)(x+y)