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Kassmariks
@Kassmariks
July 2022
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Разложите на множители
а)3x+9-xy-3y
б)2x²+4-2x⁴-x⁶
Найдите значение выражение
2xy-4y-x³-x² при x=2, y=2
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nafanya2014
Verified answer
А)3x+9-xy-3y=(3х+9)-(ху+3у)=3(х+3)-у(х+3)=(х+3)(3-у)
б)2x²+4-2x⁴-x⁶=(2х²+4)-(2х⁴+x⁶)=2(х²+2)-х⁴(2+х²)=(х²+2)(2-х⁴)
Найдите значение выражения
2xy-4y-x³-x²
при x=2, y=2
2·2·2-4·2-2³-2²=8-8-8-4=-12
2 votes
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Answers & Comments
Verified answer
А)3x+9-xy-3y=(3х+9)-(ху+3у)=3(х+3)-у(х+3)=(х+3)(3-у)б)2x²+4-2x⁴-x⁶=(2х²+4)-(2х⁴+x⁶)=2(х²+2)-х⁴(2+х²)=(х²+2)(2-х⁴)
Найдите значение выражения
2xy-4y-x³-x²
при x=2, y=2
2·2·2-4·2-2³-2²=8-8-8-4=-12