Question

Simplify the expression

-5 + i / 2i

Answer 1

-3

Answer 2

How did you get that? @Dustin_Whitelock

Answer 3

Sorry it was wrong. Extremely sorry.

Answer 4

-9/2

Answer 5

How did you get that then?

Answer 6

see, i/2i? You are left with 1/2. understand why?

Answer 7

Is it because you can cross out the i's?

Answer 8

Yes.

Answer 9

Now you're left with -5+1/2. Got it?

Answer 10

And do you add -5+1 and then divide?

Answer 11

No, I didn't use the bracket, but it actually is -5+(1/2) which means the same without brackets.

Answer 12

Can you explain it for me? I'm still trying to understand it :c lol

Answer 13

which grade are you in?

Answer 14

10th..

Answer 15

It must be easy for you. Okay....

Answer 16

there's this rule called BODMAS

Bracket Of Divide Multiply Add Subtract
Use this serially from beginning to know what to use first.
Use this rule and in -5+1/2, you do the divide first because of bodmas, I guess you're getting what I'm saying.

Answer 17

So you do 1/2 first.
You can say it's 0.5, if you simplify it. so -5+0.5 is same as 0.5-5 (remember distributive rule?) so it is -(5-0.5) or -4.5

Answer 18

You can also say 5 as 10/2
so -5 is -10/2
so -5+1/2 is -10/2 +1/2
which is (-10+1)/2
which is -9/2
if you divide -9 by 2 you'll get -4.5, the previous answer

Answer 19

If you don't know why or how to convert 5 to 10/2, this is for you
5 is 5/1, I hope you know it.
multiply both the numerator and denominator by 2, you get 10/2. this 10/2 makes it easier for you to operate it with 1/2 (in case of addition or subtraction) as you only need to operate on the numerator and the denominator is common to both which is 2.

Answer 20

if you want to know how or why I converted 1/2 to .5:

multiply numerator and denominator by 5, you get 5/10. It's a trick for you, if the numerator is 10 or 100 or 1000 or something like that; put a decimal in front of as many digits from the rhs of the last decimal of the numerator (here decimal notation of 5 is 5.0) as are there zeroes in the 10 or 100 or 1000, etc. If there aren't enough digits, replace the empty places as 0.

anyway by this rule 5/10 becomes 0.5. Anyway if this trick is confusing simply divide 1 by 2 or 5 by 10.
now operate with -5 and the you get the answer.

Answer 21

If you have a doubt ask me now, I'll be leaving the question soon. If you find my explanation satisfactory, please award me a medal. Thank you.... ;D

Answer 22

So the answer is -4.5?

Answer 23

Yes.