!!Помогите!! решите уравнения
[tex] 3x^{2}+5x-2=0 [/tex]
[tex] 2x^{2}-x-3=0 [/tex]
[tex] 9x^{2}-6x+1=0 [/tex]
[tex] 5x^{2}-8x-4=0 [/tex]

[tex] D=b^{2}+4ac [/tex]
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