Question

Which expression does not give a result equal to the other expressions if a equals two and b equals five?

begin square root symbol a squared minus three end square root symbol plus b squared.

four times a squared plus begin square root symbol four times b squared end square root symbol.

thirty minus begin square root symbol b squared minus a squared minus b end square root symbol.

begin square root symbol eighteen times a end square root symbol plus b squared minus a.

Answer 1

how would you have proceeded?

Answer 2

what?

Answer 3

i mean to say what would you have done if you came across this question..how would you have proceeded with the sum...you must have tried this..what did you do? what idea came across your mind?

Answer 4

i have no idea how to do this

Answer 5

okay..no problem..you know what a square root symbol is..right?

Answer 6

yes

Answer 7

cheers then..let's try and work out the last expression out of the four

Answer 8

ok

Answer 9

\[\sqrt{18a} +b^{2} - a\]
1. We start square root symbol.
2. Under the symbol we write 18 times 'a'.
3. We end the square root symbol.
4. We add b^2 (read as b squared or b raised to the power of 2)
5. We subtract 'a'.
6. We get the desired expression according to the question.

Would you mind substituting the values of 'a' and 'b' in this expression and evaluate this?

Answer 10

i dont get it. at all, this all confuses me

Answer 11

Exactly where do you find it confusing?

Answer 12

the whole equation

Answer 13

do you know the answer?

Answer 14

yes. But it's for you to solve.

Answer 15

do you know how to deal with equations..suppose

a=10, b=20

what will be the value of this expression:-

a+b+20=

Answer 16

isnt the answer begin square root symbol a squared minus three end square root symbol plus b squared?

Answer 17

hold on..i was solving the last expression not the first expression..check the last expression out of the four that you've provided us with :-

begin square root symbol eighteen times a end square root symbol plus b squared minus a.

Answer 18

can you just tell me if im right?

Answer 19

your answer is to which question?

Answer 20

what?

Answer 21

i can surely tell you the answer but would first like you to try.

Answer 22

i am trying on paper and i dont get it can you just give me the answer?

Answer 23

no pretty woman..i can't..it's against the rules of the page..we got to help one understand the sum and make sure one is able to do it himself after providing the explanation..just tell me exactly where you find it confusing and i'll try my best to explain

Answer 24

nvm i got the answer thanks anyways

Answer 25

that's great..sorry i was not able to be of any help..hope you can tackle these questions with no difficulties henceforth.