Question

Please check my answer?

5^4√7 - 8^3√7 - 2^4√7 - ^3√7

3^4√7-9^3√7
-6√14
-6√7
3^4√14 - 9^3√14

My answer is C

Answer 1

Why you have used power sign there ^ ??

Answer 2

That's how it's written :)

Answer 3

Wait my internet is very slow now..

Answer 4

Is the file attached by you is your final question??

Answer 5

It's okay :) My internet gets slow too, plus I have a Dell from hell

Answer 6

Is this your question??

\[\large 5 \sqrt[4]{7} - 8 \sqrt[3]{7} - 2 \sqrt[4]{7} - \sqrt[3]{7}\]

Answer 7

Hey Dell is a good company no??

Answer 8

It's a terrible company for me :( and yes!

Answer 9

Then C looks not nice to me..

Answer 10

What looks nice to you then/ Can you explain why? :)

Answer 11

See you can add or subtract the like terms only in Mathematics..

\(\sqrt[3]{7}\) and \(\sqrt[4]{7}\) are not like terms you cannot add or subtract them..

Okay??

Answer 12

You can only add or subtract : \(4 \sqrt[3]{7}\) and \(3 \sqrt[3]{7}\)

Answer 13

The nth power on root must be same.

If it is 3 then in both the terms it should be 3..

Answer 14

Now can you tell what things in your question can you add or subtract??

Answer 15

okay :)

Answer 16

Yes

Answer 17

The exponents?

Answer 18

3x3?

Answer 19

See don't get confuse :

Say you can solve this by substitute method it will become easy for you then:

Put : \(\sqrt[3]{7}\) = x and \(\sqrt[4]{7}\) = y :

Now your question has become:

\[5y - 8x - 2y- x\]

Can you solve this or not ??

Answer 20

No

Answer 21

Tell me : \(5y - 2y = ??\)

Answer 22

3y

Answer 23

Yes, similar way : \(-8x - x = ??\)

Answer 24

I don't know about that :/

Answer 25

- and - in case of addition is : (-) (-) becomes +..

but sign does not change:

So:

-8x - x = -9x

If both are negative, then value gets added but sign remains negative..

Answer 26

Okay :)