Решите 2 уравнения. Срочно!
1) |x + y - 5| + x² - 6xy + 9y² = 0
2) x - 7 + |x| · x = 7 |x|
1) |x + y - 5| + x² - 6xy + 9y² = 0
2) x - 7 + |x| · x = 7 |x|
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Ответ:
2)х=7
Объяснение:
2)x-7+ | x | xx=7x |x|
x+ |x/xx-7x |x| = 7
x+xxx -7x=7, x ≥ 0 X-XXX-7x - x = 7 , x < 0
X = -1
x = 7 , X ≥ 0
X = 1
x = 7 x < 0
x = 7
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