pls pls answer these questions fast as possible i have an exam tmrw. I have attached the questions. who answers the first will be marked as brainliest .
CH : ALGEBRIC IDENTITIES
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Refer to the attached image
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(7pqr–5)^–(7pqr+5)^
(pqr+1)^-pqr-1)^. =–35
(7pqr-5+7pqr+5×(7pqr-5-7pqr-5)
(pqr+1+pqr–1) (pqr+1-pqr+1)
14pqr×(-10)
2pqr×2. = –35
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