(x+2) (x-6) -(x-7) (x+7) >30-3x...

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August 2021 1 12 Report

(x+2) (x-6) -(x-7) (x+7) >30-3x

Answers & Comments

mukus13

Verified answer

$(x+2)(x-6)-(x-7)(x+7)\ \textgreater \ 30-3x$

$x^2+2x-6x-12-(x^2-49)\ \textgreater \ 30-3x$

$x^2+2x-6x-12-x^2+49\ \textgreater \ 30-3x$

$-4x+37\ \textgreater \ 30-3x$

$-4x+3x\ \textgreater \ 30-37$

$-x\ \textgreater \ -7$

$x\ \textless \ 7$

------------------(7)--------------
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Ответ: $(-$ ∞ $;7)$

7 votes Thanks 8

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