factorise this problem
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(a2 +b2+2ab=(a+b)2)
here a=a2 and b=bc
[(a2)2+(bc)2+2a2bc ]- a2[b2+C2+2bc]
a4+b2c2+2a2bc- a2b2-a2c2-2a2bc
a4+a2b2-a2c2+b2c2
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