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Question

State true or false:
(xaxb)a2ab+b2×(xbxc)b2bc+c2×(xcxa)c2ca+a2= x2(a3+b3+c3)

A
True
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B
False
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Solution

The correct option is A True
(xaxb)a2ab+b2×(xbxc)b2bc+c2×(xcxa)c2ca+a2
=(xa(b))a2ab+b2×(xb(c))b2bc+c2×(xc(a))c2ca+a2
=(xa+b)a2ab+b2×(xb+c)b2bc+c2×(xc+a)c2ca+a2
=(xa3+b3)×(xb3+c3)×(xc3+a3)
=xa3+b3+b3+c3+c3+a3
=x2(a3+b3+c3)

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