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Gaiari Pt a) (x^2-5x)^2+10(x^2-5x)+24=0 b) (x^2+x+1)(x^2+x+2)=12 c) x(x+1)(x^2+x+1)=42 d) x(x+1)(x-1)(x+2)=24 e) (x+2)(x+3)(x-5)(x-6)180
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