1.

(ii) (p+q)²- (p - q)²+ p²q²​

Answer»

-STEP EXPLANATION:(P+Q)²= p²+2pq+q²(p-q)²= p²-2pq+q²(p+q)²- (p - q)²+ p²q²=p²+2pq+q²-(p²-2pq+q²)+p² q²=p²+2pq+q²-p²+2pq-q²+p² q²=4pq+p² q²=pq(4+pq)



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