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Question
The product of (t+s2) and (t2s) is
Options:
A .   t3+s2t2−st−s3
B .   t3+s2t2−st−s2
C .   t3+s2t2−2st−s3
D .   t3+t2−st−s3
Answer: Option A
:
A
(t+s2)(t2s)=[t(t2s)+s2(t2s)]
=t3ts+s2t2s3
=t3+s2t2sts3

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