Sumithra Sen wrote:
What is the answer for this one-
I come up with A as the answer
from one ...
a ^2 - b ^ 2 = ( a+b) ( a-b) = 16
The only values that satify this are 8 and 2 ...
you can solve for a nad b...
I don't agree with this.
We cannot assume that the respective values will be a-b= 2
and a+b= 8.
a and b can be any values here. one of them could be negative, or a fraction or any combination.
Also if b is negative it will result in a-b actually greater than a+ b, impacting the values of a and B and thus the values of a^4-b^4.
So I go with C.