Предмет: Алгебра, автор: LockingBoy

$-0,25x^{2}+x-1=0;\\1,2x^{2}+ 9,6x+ 18 = 0;\\0,9x^{2}-13,5x-90=0;$

Ответы

Автор ответа: OblivionFire

0

Объяснение:

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