Ask Singapore Homework?

Upload a photo of a Singapore homework and someone will email you the solution for free.



Question

secondary 2 | Maths
One Answer Below

Anyone can contribute an answer, even non-tutors.

Answer This Question
Cshjwrk
Cshjwrk

secondary 2 chevron_right Maths chevron_right Singapore

Hi pls help thanks

Date Posted: 4 years ago
Views: 275
snell
Snell
4 years ago
note:

6x²y = 6x(xy)

16y - 8x = 8(2y - x)

12x -24y = -12(2y - x)

4xy² = 4y(xy)

subst. the above into qn, &
start cancelling ...


...

See 1 Answer

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
Eric Nicholas K
Eric Nicholas K's answer
5997 answers (Tutor Details)
1st
When two fractions are being multiplied, the corresponding numerators multiply and the corresponding denominators multiply.

We group like terms together (we group all numbers together, all x together, all y together etc).

Lastly, the x - 2y and the 2y - x are not the same number, but they look similar. The trick is to write x - 2y as - (2y - x) or to write 2y - x as - (x - 2y), so that there will be a term which is common in both the numerator and the denominator, which will cancel out each other, leaving behind -1.