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Автор - ivsnofhj

Найдите значение выражения при х=0.3
(8х-1)(3х+1)-(16х-3)(4х+1)

Ответ

Автор - WhatYouNeed

(8x-1)(3x+1)-(16x-3)(4x+1)=\=24x^2+5x-1-(64x^2+4x-3)=\=-40x^2+x+2=\=-40frac{3^2}{10^2}+frac{3}{10}+2=\  =frac{-4*9}{10} +frac{3+20}{10}=\ =frac{-36+23}{10} =frac{-13}{10}=-1.3

Ответ: -1,3

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