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AliAsmina
@AliAsmina
October 2021
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найдите значения вырожения; 5 корень из 7 × ( - 7 ) помогите пожалуста 1 и 4 номер
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Answers & Comments
1)![5\sqrt{7}*(-\sqrt{7})=-5*7=-35 5\sqrt{7}*(-\sqrt{7})=-5*7=-35](https://tex.z-dn.net/?f=5%5Csqrt%7B7%7D%2A%28-%5Csqrt%7B7%7D%29%3D-5%2A7%3D-35)
2)![0,2\sqrt{72}*(-\sqrt{2})=- 0,2\sqrt{72*2}=- 0,2\sqrt{144}=- 0,2*12=-2,4 0,2\sqrt{72}*(-\sqrt{2})=- 0,2\sqrt{72*2}=- 0,2\sqrt{144}=- 0,2*12=-2,4](https://tex.z-dn.net/?f=0%2C2%5Csqrt%7B72%7D%2A%28-%5Csqrt%7B2%7D%29%3D-%200%2C2%5Csqrt%7B72%2A2%7D%3D-%200%2C2%5Csqrt%7B144%7D%3D-%200%2C2%2A12%3D-2%2C4)
3)![5\sqrt{49}*(-\sqrt{7})^2= 5*7*7=245 5\sqrt{49}*(-\sqrt{7})^2= 5*7*7=245](https://tex.z-dn.net/?f=5%5Csqrt%7B49%7D%2A%28-%5Csqrt%7B7%7D%29%5E2%3D%205%2A7%2A7%3D245)
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