Question

$\sqrt{ {x}^{2} } + 8 = 2x + 1$
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Answer 1

Объяснение:

$\sqrt{x^{2} } +8=2x+1\\|x|+8=2x+1\\|x|-2x=1-8\\|x|-2x=-7\\x-2x=-7, x\geq 0\\-x-2x=-7, x<0\\-x = -7, x\geq 0\\-3x = -7, x<0\\\x=7, x\geq 0\\x = \frac{7}{3} , x<0\\x = 7$

x∉∅

Ответ: x = 7