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Chamomilepb
@Chamomilepb
July 2022
2
19
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Даю 20 баллов!!!!!!!
Помогите пожалуйста срочно!
№10 с корнями на одном фото и №9 с корнями на другом
Вроде и не сложно, но я не помню как это делается
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krampus777
1)
2)
8 votes
Thanks 12
yugolovin
Verified answer
Ответ:
Н
а
д
е
ю
с
ь
п
о
м
о
г
)
)
6 votes
Thanks 6
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Answers & Comments
1)![\frac{2\sqrt{5}-5\sqrt{2}-\sqrt{10}}{\sqrt{10}+\sqrt{2}-2}=||\sqrt{2}=x; \sqrt{5}=y||=\frac{x^2y-y^2x-xy}{xy+x-x^2}=\frac{xy(x-y-1)}{x(y+1-x)}=-y=-\sqrt{5} \frac{2\sqrt{5}-5\sqrt{2}-\sqrt{10}}{\sqrt{10}+\sqrt{2}-2}=||\sqrt{2}=x; \sqrt{5}=y||=\frac{x^2y-y^2x-xy}{xy+x-x^2}=\frac{xy(x-y-1)}{x(y+1-x)}=-y=-\sqrt{5}](https://tex.z-dn.net/?f=%5Cfrac%7B2%5Csqrt%7B5%7D-5%5Csqrt%7B2%7D-%5Csqrt%7B10%7D%7D%7B%5Csqrt%7B10%7D%2B%5Csqrt%7B2%7D-2%7D%3D%7C%7C%5Csqrt%7B2%7D%3Dx%3B%20%5Csqrt%7B5%7D%3Dy%7C%7C%3D%5Cfrac%7Bx%5E2y-y%5E2x-xy%7D%7Bxy%2Bx-x%5E2%7D%3D%5Cfrac%7Bxy%28x-y-1%29%7D%7Bx%28y%2B1-x%29%7D%3D-y%3D-%5Csqrt%7B5%7D)
2)![\sqrt{19-6\sqrt{2}}+\sqrt{43-30\sqrt{2}}=\sqrt{19-2\sqrt{18}}+\sqrt{43-2\sqrt{450}}= \sqrt{19-6\sqrt{2}}+\sqrt{43-30\sqrt{2}}=\sqrt{19-2\sqrt{18}}+\sqrt{43-2\sqrt{450}}=](https://tex.z-dn.net/?f=%5Csqrt%7B19-6%5Csqrt%7B2%7D%7D%2B%5Csqrt%7B43-30%5Csqrt%7B2%7D%7D%3D%5Csqrt%7B19-2%5Csqrt%7B18%7D%7D%2B%5Csqrt%7B43-2%5Csqrt%7B450%7D%7D%3D)
Verified answer
Ответ:
Надеюсь помог))