factor of p²+q²+r²-2pq-2qr+2rp
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Answer:
(p+q)
2
+r
2
+2r(p+q)
=(p+q)
2
+r
2
+2r(p+q)
Using (a+b)
2
=a
2
+b
2
+2ab, where a=(p+q) and b=r
=(p+q+r)
2
Step-by-step explanation:
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