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# c2 question Watch

1. hi, so i'd really appreciate it if someone could take the time to look at this textbook example and explain how the textbook got from the the second last line to the final answer for bii:

i think it's just the indices part that i'm having trouble with.
if someone could maybe break it down into smaller steps then that'd be amazing.
2. (Original post by PurpleSquid)
hi, so i'd really appreciate it if someone could take the time to look at this textbook example and explain how the textbook got from the the second last line to the final answer for bii:

i think it's just the indices part that i'm having trouble with.
if someone could maybe break it down into smaller steps then that'd be amazing.
Remember that

and then just break up what you've got into:

In your final fraction divide top and bottom by and you get what they've got
3. (Original post by PurpleSquid)
hi, so i'd really appreciate it if someone could take the time to look at this textbook example and explain how the textbook got from the the second last line to the final answer for bii:

i think it's just the indices part that i'm having trouble with.
if someone could maybe break it down into smaller steps then that'd be amazing.
So:
You split up the brackets:
Spoiler:
Show

Then you have:
Spoiler:
Show

Now note that

Now:
Spoiler:
Show

Recombine everything using laws of indices:
Spoiler:
Show

Now rewrite as:
Spoiler:
Show
4. (Original post by davros)
Remember that

and then just break up what you've got into:

In your final fraction divide top and bottom by and you get what they've got
thanks!

EDIT: thank you both!
5. (Original post by PurpleSquid)
thanks!

EDIT: thank you both!
Any time

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