Предмет: Алгебра, автор: pfqwtd

Решите:
5x^2-9x+4<=0

Ответы

Автор ответа: m11m
2
5x²-9x+4≤0
5x²-9x+4=0
D=81-4*5*4=81-80=1
x₁=9-1 = 0.8
      10 
x₂=9+1=1
      10
    +                  -               +
--------- 0.8 ------------ 1 -------------
                  \\\\\\\\\\\\\
x∈[0.8; 1]
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