Because cd is reciprocal, d=( 1/c)

So x 2-(a+b+CD) x+(a+b) 2011+(-CD) 2012.

=25-[a-a+c( 1/c)]x+(a-a)^20 1 1+[-c( 1/c)]^20 12

=25- 1x+ 1

=26-x

Because the absolute value of x is equal to 5.

So the answer is 26-5=2 1 or 26+5=3 1.