Question

(4-5√2)2 решите пожалуйста

Answer 1

файл

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0548e3fa58426054bae73f3a4fdfb494.doc

Answer 2

$(4-5sqrt{2})^{2}=4^{2}-2cdot4cdot5sqrt{2}+(-5sqrt{2})^{2}=16-40sqrt{2}+(-sqrt{25cdot2})^{2}=16-40sqrt{2}+(-sqrt{50})^{2}=16-40sqrt{2}+50=66-40sqrt{2}$

0548e3fa58426054bae73f3a4fdfb494.doc