3-pqr+pqr² and -2pqr²+pqr²
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Step-by-step explanation:
Answered by
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Step-by-step explanation:
– pqr (p2 + q2 + r2) = – (pqr) × p2 – (pqr) × q2 – (pqr) × r2 = – p3qr – pq3r – pqr
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