Question

√(x) + √(x+4)= 3
Пж решите

Answer 1

√x + √(x+4) = 3 , x≥0

√(x+4) = 3 - √x    /²

x+4=9 - 6√x + x

4=9-6√x

6√x=5

√x=5/6   /²

x=25/36

L=√x+√(x+4)=5/6 + √(25/36+144/36)=5/6+√(169/36)=5/6+13/6=3

P=3, L=

Otvet: x=25/36