if p-q=9 and pq=36,evaluate 1 p+q 2 p²-q²
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Answer:
(p-q)^2=(p+q)^2 -4pq
(9)^2= (p+q)^2 -4(36)
(p+q)^2= 225
p+q=15------1
p-q= 9--------2
adding equation 1 and 2
=> 2p= 24
=> p= 12
=> q= 15-12
= 3
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