(x - 2)(x - m) = (p - 2)(p - m)展开得：x^2 - mx - 2x + 2m = p^2 - mp - 2p + 2m消去相同项 2m ：x^2 - mx - 2x = p^2 - mp - 2px^2 - p^2 - mx - 2x + mp + 2p = 0提取后两项的公因式 (m+2) ：x^2 - p^2 - [(m +...