\(a,=\sqrt{17-2.2\sqrt{2}.3}+\sqrt{9+2.2\sqrt{2}.1}=\sqrt{\left(2\sqrt{2}-3\right)^2}+\sqrt{\left(2\sqrt{2}+1\right)^2}=\left|2\sqrt{2}-3\right|+\left|2\sqrt{2}+1\right|=3-2\sqrt{2}+2\sqrt{2}+1=4\\ b,=\sqrt{\left(2-\sqrt{2}\right)^2}+\sqrt{\left(3\sqrt{2}-2\right)^2}=\left|2-\sqrt{2}\right|+\left|3\sqrt{2}-2\right|=2-\sqrt{2}+3\sqrt{2}-2=2\sqrt{2}\)