simplify
(p+q)^2 - (p-q)^2
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Answered by
1
4pq
Step-by-step explanation:
(p+q)²-(p-q)²
(p²+2pq+q²)-(p²-2pq+q²)
After opening brackets
p²+2pq+q²-p²+2pq-q²
4pq
Not sure about the answer
Answered by
1
Step-by-step explanation:
(p+q)²-(p-q)²
(p²+q²+2pq)- (p²+q²-2pq) { (a+b)²=a²+b²+2ab,
(a-b)²=a²+b²-2ab}
=p²+q²+2pq - p²-q²+2pq (here p²&q² get cancelled)
=4pq
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