1
2x^2 + px + 4 = 0 if one of the roots is 2 then we have 2*2^2+2p+4=0-->p= -6 with p known we have 2x^2- 6x+4=0--> x^2-3x+2=0--> (x-2)(x-1)=0 x1=2 x2=1