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help maths driving son mad

(10 Posts)
bkgirl Mon 03-Nov-14 20:54:16

Son in yr 11 has this sum which is driving him nuts. I am useless, can anyone help?
4 xsquared y - 6xysquared over 8xy

TheFirstOfHerName Mon 03-Nov-14 20:58:43

You can simplify it to 0.5x - 0.75y

TheFirstOfHerName Mon 03-Nov-14 20:59:53

But it is an expression not a sum, so it depends on what the question is.

Littlemissjt Mon 03-Nov-14 21:03:15

Hi, he needs to try and simplify this fraction by looking for things which he can cancel down.

First you can cancel an x in every term leaving you 4xy - 6y squared over 8y.

Similarly you can then cancel the y'sin each term. This leaves 4x - 6y over 8.

Finally the numbers can all be divided by 2. Final answer 2x - 3y over 4.

These steps can be done in any order to get to final answer. Hope this helps smile

TheFirstOfHerName Mon 03-Nov-14 21:05:33

Littlemissjt gave a much better explanation than I did. Good thing I'm not a teacher. grin

bkgirl Mon 03-Nov-14 21:05:34

Sorry I can't write it on the screen as a sum

The top x on the left should be squared and the top y on the right should be squared

Littlemissjt Mon 03-Nov-14 21:07:27

Thanks thefirstofhernamegrin

TheFirstOfHerName Mon 03-Nov-14 21:10:47

I'm reasonably good at algebra, just not very good at explaining it to other people. smile

bkgirl Mon 03-Nov-14 21:17:45

Thank you for helping smile

Littlemissjt Mon 03-Nov-14 21:26:49


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