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Автор - 3344ss

9x^2+40x+16=0 решите уравнение​

Ответ

Автор - wieslawlozickip5w1nd

Ответ:

Объяснение:

9x²+40x+16=0

Δ=1600-576=1024

√Δ=32

x1=(-40+32)/18=-8/18=-4/9

x2=(-40-32)/18=-72/18=-4

++++++       -------          +++++

-----------(-4)--------(-4/9)----------

x ∈ (-∞;-4) U (-4/9;∞)

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