Question

write expanded from of p ?​

Answer 1

Answer:

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We need to expand (p+2q+r) 2 We know that (x+y+z) 2 =x 2 +y 2 +z 2 +2xy+2yz+2xzHere x=p,y=2q and z=r therefore, (p+2q+r) 2 =(p) 2 +(2q) 2 +(r) 2 +2(p)(2q)+2(2q)(r)+2(p)(r)= p 2 +4q 2 +r 2 +4pq+4qr+2pr