Cho các số dương a,b,c thỏa mãn x1−y2+y1−z2+z1−x2=32" role="presentation" style="font-family: 'Open Sans', sans-serif; display: inline-block; line-height: 0; font-size: 18.04px; word-wrap: normal; word-spacing: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; padding-top: 1px; padding-bottom: 1px; position: relative;">x√1−y2+y√1−z2+z√1−x2=32x1−y2+y1−z2+z1−x2=32. CMR:x2+y2+z2=32" role="presentation" style="font-family: 'Open Sans', sans-serif; display: inline-block; line-height: 0; font-size: 18.04px; word-wrap: normal; word-spacing: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; padding-top: 1px; padding-bottom: 1px; position: relative;">x2+y2+z2=32x2+y2+z2=32