x + y + z = 12x² + y² + z² = 483x - 2y -z = ?как это решить ? Пожалуйста объясните . Буду очень благодарна .. Created by mariamgrigoryan458. algebra-ru

x + y + z = 12x² + y² + z² = 483x - 2y -z = ?как это решить ? Пожалуйста объясни...

mariamgrigoryan458 @mariamgrigoryan458

July 2022 1 9 Report

x + y + z = 12
x² + y² + z² = 48
3x - 2y -z = ?
как это решить ? Пожалуйста объясните . Буду очень благодарна .

Answers & Comments

buuuukasha

Х=4

У=4

Z=4

Подставляем эти значения и все сходится

Сначала 12 разделить на 3 и понимаем что это равно 4, то есть 4+4+4=12.

Затем 4 в квадрате равно 16, то есть 16+16+16=48.

Ну и последнее понятно думаю

$4 + 4 + 4 = 12 \\ {4}^{2} + {4}^{2} + {4}^{2} = 48 \\ 3 \times 4 - 2 \times 4 - 4 = 12 - 8 - 4 = 0$

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