Предмет: Алгебра, автор: ayjerenmerdanova2010

найдите значение выражения (2x y)(2x+ y)-(x^2+y^2) при x=1 1/3,y=2

Ответы

Автор ответа: anyamarcenuk

Ответ:

14 4/9

Объяснение:

(2ху)(2х+у)-(х²+у²)=4х²у+2ху²-х²-у²

если х=1 1/3, а у=2, то:

4х²у+2ху²-х²-у²=4×(1 1/3)²×2+2×1 1/3×2²-1 1/3²-2²=8 8/9+10 6/9-1 1/9-4=19 5/9-1 1/9-4=14 4/9

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