Предмет: Алгебра, автор: zzz99

x(3x-19)+(3x-4)(2x+9)

Ответы

Автор ответа: Norive

$x(3x-19) + (3x-4)(2x+9)=3x^2-19x+6x^2+19x-36$
$=9x^2-36=9(x-4)(x+4)$

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