1. equation

Please, dear teachers, could you help me out with this?

I am trying to speak an equation, so I'd like to know how to do that.

The equations is:

And this is my shot/try:

open brace, P plus a (times) n square over v square close brace, open parenthesis, V minus n (times) b, close parenthesis, is equal to n (times) R (times) T.

where '(times)' is optional.

So, Is that right and usual?

Thank you

2. Re: equation

open parenthesis, V minus n (times) b, close parenthesis

could also be:

(V-n x b)

So I would not use the word "times"

I'd call it "nb"

3. Re: equation

How'd you call this:

a) 2^3 = 8
b) 2^4 = 16
c) 2^5 = 32
d) 2^n

4. Re: equation

open parenthesis, V minus n (times) b, close parenthesis

could also be:

(V-n x b)

That is the equation given by marciobarbalho. Multiplication takes precedence over subtraction. Did you mean:

(V-n) times b; or b(V-n)

The relocation of the parenthesis takes care of that.

a) 2^3 = 8
2 (to the) (raised to the) third power equals 8
...to the fourth power/to the fifth power/to the nth power

5. Re: equation

The equation is (V - nb) or (V - n*b).

In Portuguese, we usually call x^2 like this:
x square.
Do people always call it like that?

where 'square' is related to two equal sides of something, x*x

x^3 is very common people say something related to 'cube', meaning 3 equal sides of something.
How'd you call that in English?

x^4 is called "raised to the fourth power"

Thank you.

6. Re: equation

Yes, X squared, x^2 or X2 (except the 2 should be at the top of the X, not the bottom) is easy, as is X cubed. But from then on, 'to the power of', or X to the fourth' is usual, than something like 'X quadrupled' which is a mouthful.

7. Re: equation

I wouldn't call the square brackets "braces"; in my understanding a brace is a curly bracket ({}). But I'm not a mathematician or a physicist, and I don't know whether they observe different conventions.

And a quantity raised to the power 2 is - in Br E at least - "squareD".

b

8. Re: equation

Then, x^2 is called x squared and x^3 is called x cubed. From then on, x to the th-power.

Thank you guys.

9. Re: equation

Originally Posted by marciobarbalho
Then, x^2 is called x squared and x^3 is called x cubed. From then on, x to the th-power.

Thank you guys.
'...to the Nth power' will never be wrong; sometimes, though, it's shortened to '...to the Nth'.

b

10. Re: equation

Further reflection about that "sometimes". I think it's more common to keep the word "power" when talking about larger numbers - the time since the Big Bang will be 't to the Nth power', but N^5 may well be expressed as "N to the fifth".

b

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