x2−qx+p=0x^{2}-q x+p=0x2−qx+p=0
x2−px+q=0x^{2}-p x+q=0x2−px+q=0
px2−qx+q=0p x^{2}-q x+q=0px2−qx+q=0
qx2−px+p=0q x^{2}-p x+p=0qx2−px+p=0
