Hello forum, Vaironxxrd here.

I have a question about exponents. If I have,

Would that be or .

If possible can you guys provide other examples?

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- Oct 8th 2011, 08:47 AMvaironxxrdevaluating numerical expression
Hello forum, Vaironxxrd here.

I have a question about exponents. If I have,

Would that be or .

If possible can you guys provide other examples? - Oct 8th 2011, 08:57 AMSironRe: evaluating numerical expression
It's indeed . For example, consider which is offcourse and therefore there're not equal.

So it's important to use brackets! - Oct 8th 2011, 10:54 AMvaironxxrdRe: evaluating numerical expression
- Oct 8th 2011, 10:58 AMe^(i*pi)Re: evaluating numerical expression
Exponents come before multiplication in the order of operations and a minus sign in front is multiplying by -1.

However, brackets come before exponents so if the multiplication is done*inside*the bracket it too is affected by the exponents.

- the brackets here are unnecessary and only serve to complicate matters IMO. - Oct 8th 2011, 11:02 AMvaironxxrdRe: evaluating numerical expression
- Oct 8th 2011, 11:06 AMFrameOfMindRe: evaluating numerical expression
Remember BIDMAS (Brackets, Indices, Division, Multiplication, Addition, Subtraction).

The order of operands is very important, and this is where you're having trouble.

-9 is essentially like saying 0 - 9, you just omit the 0.

Now, from BIDMAS, we know that everything in brackets is evaluated first, and that indices/multiplication is evaluated before subtraction.

So (-9^2) is like saying (0 - 9^2). You evaluate the index first, then you subtract the result from 0.

0 - (9)(9) = 0 - 81 = -81

Whereas, in (-9)^2 you evaluate everything in brackets first, so (0 - 9)^2 = (-9)(-9) = 81, because multiplying an even number of negatives together results in a positive.

I hope that was clear enough. - Oct 9th 2011, 08:34 AMvaironxxrdRe: evaluating numerical expression
- Oct 9th 2011, 08:41 AMskeeterRe: evaluating numerical expression
- Oct 9th 2011, 08:43 AMvaironxxrdRe: evaluating numerical expression
Yeah sorry for that. Does it matter how many threads I start? I feel like it might be annoying.

- Oct 9th 2011, 08:55 AMskeeterRe: evaluating numerical expression