Show that :
( 7pqr-5)² - (7pqr+5)²/(pqr+1)² - (pqr-1)² = -35
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Step-by-step explanation:
(7pqr-5)^2-(7pqr +5)^2/(par+1)^2-(pqr-1)^2
=(7pqr-5 +7pqr+5) (7pqr-5-7pqr-5)/(pqr +1+pqr-1) (par+1-pqr+1)
=14pqr. -10/2pqr.2
= -35 proved
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