Given Exp.
= x(b - c)(b + c - a) . x(c - a)(c + a - b) . x(a - b)(a + b - c)
= x(b - c)(b + c) - a(b - c) . x(c - a)(c + a) - b(c - a)
. x(a - b)(a + b) - c(a - b)
= x(b2 - c2 + c2 - a2 + a2 - b2)>/sup> . x-a(b - c) - b(c - a) - c(a - b)
= (x0 × x0)
= (1 × 1) = 1.