Question

$2 \sqrt{x + 5 = x + 2}$
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Answer 1

2√(х+5) = х+2

{х+2 ⩾ 0

{4(х+5)=х²+4х+4

{х ⩾ -2

{4х+20-х²-4х-4=0

{х ⩾ -2

{(х+4)(4-х)=0

{х ⩾ -2

[х=-4 – не корень

[х=4

Ответ: 4.