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dasha20002009
@dasha20002009
July 2021
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Помогите, пожалуйста, тут сначала раскрыть скобки, а потом сократить
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zaharova98
[tex] \frac{4xy}{x+4y} * ( \frac{x}{4y} - \frac{4y}{x} ) = \frac{4xy}{x+4y} * \frac{x^2 - 4 y^{2} }{4xy} = \frac{4xy * (x^2- 4y^2)}{(x+4y) * 4xy} = \frac{(x-4y)(x+4y)}{(x+4y)} = x-4y
[tex] 4\sqrt{8} +9 - 4( \sqrt{8} -2)= 4 \sqrt{8} +9 - 4\sqrt{8} +8 = 17
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Answers & Comments
[tex] 4\sqrt{8} +9 - 4( \sqrt{8} -2)= 4 \sqrt{8} +9 - 4\sqrt{8} +8 = 17