1.

Write a second degree polynomial p(x) in which \(p(\sqrt{2}+1)=p(\sqrt{2}-1)=0\)

Answer»

If \(p(\sqrt{2}+1)=0\), then x\(-(\sqrt{2}+1)\) is a factor.

If \(p(\sqrt{2}-1)=0\), then x\(-(\sqrt{2}-1)\) is a factor.

p(x) = [x-(√2+1)][x-(√2-1)]

=  [x-(√2-1)][x-(√2+1)]

= (x-√2)2 - 1 = x2 - 2√2 x+2-1

= x2-2√2x+1



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