Quantitative Reasoning

kstv wrote:trying the same method of substituting the value
[ √(9 + √80) + √(9 - √80) }² a = 9 b = √80
[(√(a+b)+√(a-b)]²= a+b+a-b+2√(a+b)(a-b) = 2a + 2√a²-b²
2*9 + 2√81-80 = 18 + 2 = 20
Phew ! Much simpler
thanks to AtifS

Thank you! for explaining it in an easy way as well as using sqrt symbols (I wanted to use but couldn't find any facility in posting options). Did you solve it on some separate doc or software (e.g MS Word) and then pasted it here. By using symbols makes it easy.

press the ALT key the type the no 251 u will get √
cos ASCII code for √ is 251
try it
This feature works on BTG now.

Wow, what a beast of a problem; before looking at the explanations I thought I was going crazy. It all makes sense now though, especially since I initially misunderstood the way the problem was written out. After awhile I realized that it was in (a+b)^2 format. That helped out tremendously, as well as the other explanations in this thread. Thanks!

kstv wrote:Are there others like me who find readability of a post like 2^5*7 + 3^5 not very good.

One way is to use ASCII codes. alt 252 for ² alt 248 for degrees ° etc
But remembering them is difficult.
Like "Add Emotions Tab "why not have a tab for the commonly used Maths Symbols .
Is it feasible ?

What an Idea Sir G!! I would request you to post as many ASCII codes as you could, on a separate thread, which could be considered as STICKY, and keep updating it. I have already made similar suggestions to the forum heads and I am sure that they would very soon come up with some cool alternative for this too; but till then, your ASCII codes thread would ROCK