(b) a² + b2 + c2, a? - b2 - c2 and a² + b2 + 2ab
(d) a? - ab, b2 - bc and c- ca
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Answer:
a²+b2+c2+a²-b2-c2,a²+b2+2ab
Step-by-step explanation:
a2 +b2+a2=a²b
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