Evaluate: (i)(x^2+x+1)(x^2-x+1) (ii) (a-b+c)(b+c-a) (iii) (a+b+c) (a+b-c)
Evaluate: (i)(x^2+x+1)(x^2-x+1) (ii) (a-b+c)(b+c-a) (iii) (a+b+c) (a+b-c) (i) (x2+x+1)(x2-x+1) =x2(x2-x+1)+x(x2-x+1)+1(x2-x+1) = x4 -x3 +x2 +x3-x2+x+x2-x+1 = x4+x2+1 (ii) (a-b+c)(b+c-a) = …