б2x²-3px+(2-p)=0{x1+x2<0⇒x1+x2=1,5p<0⇒p<0{x1*x2>0⇒x1*x2=(2-p)/2>0⇒2-p>0⇒p<2{D>0⇒D=9p²-8(2-p)=9p²-16+8p>0D=64+576=640p1=(-8-8√10)/18=(-4-4√10)/9 Up2=(-4+4√10)/9p<(-4-4√10)/9 U p>(-4+4√10)/9p∈(-∞;(-4-4√10)/9)в4x²-8px+(p-3)=0{x1+x2<0⇒2p<0⇒p<0{x1*x2>0⇒(p-3)/4>0⇒p>3нет решенияг((p+1)x²+px-2=0{x1+x2>0⇒-p/(p+1)>0⇒p/(p+1)<0⇒-1<p<0{x1*x2>0⇒-2/(p+1)>0⇒2/(p+1)<0⇒p<-1нет решения