Question

Find the value of (p – q)(p + q) + (q – r)(q + r) + (r – p) (r + p)

plz ans it fast !!​

Answer 1

( p - q)( p+ q) + ( q - r)( q + r) + (r - p)( r + p)

p² - q² + q² - r² + r² - p²

0

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