решите на множестве R неравенство метод интервалов 
а) 2(3x-2)+3(4-2x)≤2
B)3x^2-8x-3>0
g)4x^2-12x+9≤0
d)-x^2+2x-7<0 
должна быть кривая знаков и ответ

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