1.
\(a)\sqrt{49}.\sqrt{144}+\sqrt{256}:\sqrt{64}.\\ =7.12+16:8.\\ =86.\\ b)72:\sqrt{2^2.36.3^2}-\sqrt{225}.\\ =72:\left(2.6.3\right)-15.\\ =-13.\)
2.
\(a)A=\sqrt{\left(2-\sqrt{5}\right)^2}+\sqrt{\left(2\sqrt{2}-\sqrt{5}\right)^2}.\\ =\sqrt{5}-2+2\sqrt{2}-\sqrt{5}.\\ =-2+2\sqrt{2}.\\ b)B=\sqrt{\left(\sqrt{7}-2\sqrt{2}\right)^2}+\sqrt{\left(3-2\sqrt{2}\right)^2}.\\ =2\sqrt{2}-\sqrt{7}+3-2\sqrt{2}.\\ =-\sqrt{7}+3.\)
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