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Автор - leila0606

2) (x + 8) (5x - 6) - 20 = 5x2;​

Ответ

Автор - МатематическийМозг

displaystyle (x + 8) (5x - 6) - 20 = 5x^2\5x^2-6x+40x-48-20=5x^2\5x^2-5x^2+40x-6x=48+20\34x=68\x=2\Otvet: quad 2.

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