... ta ®o+.c k¥t qua? sau:x -2, 5 -2, 25-1,5-1011,5 2, 25 2, 5y = 0,5x-1 ,25 -1, 125 -0,75-0,500,50,751, 125 1 ,25 y = 0,5x + 2 0,750,8751 ,25 1,5 2 2,5 2, 753, 125 3 ,25 b) khi bi¥n x la^'y ... thu+' ba):a) x2 = 2 x1 = va` x2 = - hay x1 va` x2 b) x2 = 3 x1 = va` x2 = - hay x1 va` x2 c) x2 = 3,5 x1 = va` x2 = - hay x1 va` x2 d) x2 = 4, 12 x1 = va` x2 = - hay x1 va` x2 .ba`i 4(sgk ... a: gia?i ph¬ng tro+¬nh 12x + 2 = x x = - 2, t¬ ®¨ t¦nh y : my = 2. ( -2) + 2 = - 2. va^.y ta c¨ a( -2; -2) . ec) qua b(0 ; 2) ve¬ ®o+`ng tha(?ng song song v¦i -2 -1 0 1 2 xox, ®o+`ng tha(?ng...