Question

(iv) (x2 – 2x +3) (x2 – 2x +5) - 35​

Answer 1

x2-2x = a

(a+x)(a+y)= a2+a (x+y)+xy

the given expression = (x2-2x)^2 + (x2-2x)(8) + 15

=x4-4x3+4x2 + 8x2 -8x+ 15

=x4-4x3+12x2-8x+15

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