Answers: (From smallest to the larget values)
Explanation: The given equation is
multiplying by - sign on both sides
------------------------------------- (1)
Now, let us substitute a2=x . so, a4=x2. So, equaation 1 becomes
This equation can be solved by factoring the middle term. There are two numbers -9 and -25 such that (-9)*(-25)=225 (product of first and last term) and -9-25=-34 (middle term). So,
---------------------------------------------- (2)
So, we have
---------------------------- (3)
---------------------------------- (4)
Now, since a2=x. So,
(1) using x=25 in a2=x
taking square root on both sides
So, and
(2) Using x=9 in a2=x
taking square root on both sides
So, and
For checking substiture the values of a=+3, -3, +5 and -5 one by one and check the validity of eqn 1.
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