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 Post subject: REally esy algebra question help pleasePosted: Sat Dec 22, 2007 10:55 am

Joined: Wed Oct 10, 2007 8:39 pm
Posts: 129
My son did Yoyo's picture where you colour in the picture according to what number they make (thanks for that), but how should we work this one out:

ac2 (supposed to be a small 2 as in squared)

Where a = 4 and c = 2

I thought it was:

4 x 2 = 8 and so 8 x 8 = 64

But unfortunately 64 isn't one of the options!

Any help appreciated so that my son thinks I am clever than him

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 Post subject: Posted: Sat Dec 22, 2007 11:05 am

Joined: Mon Feb 12, 2007 1:21 pm
Posts: 14004
You have to square c first then mulitply by a as it means a x c x c.

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 Post subject: Posted: Sat Dec 22, 2007 12:46 pm

Joined: Wed Oct 10, 2007 8:39 pm
Posts: 129
Guest55 wrote:
You have to square c first then mulitply by a as it means a x c x c.

Thanks for that!

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 Post subject: Posted: Sat Dec 22, 2007 7:00 pm
For the next time you have to help (tomorrow??), a x c all squared would be written (ac)2 - (small 2, but I need someone to tell me how to do the typing of squared.)

BIDMAS is supposed to help you remember the order to work stuff out.
Brackets, Indices (that's the squares etc), Division, Multiplication, Addition, Subtraction.

so ac2 is just a x c x c
a2c would be a x a x c (I tried small font for this '2', but not sure if it's worked)

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