Корень квадратный V
X + V ( 2x + 3 ) = 6
V ( 2x + 3 ) = 6 - X
( V ( 2x + 3 ))^2 = ( 6 - X ) ^2
2x + 3 > 0 ; 2x > - 3 ; X > - 1,5
2x + 3 = 36 - 12x + x^2
X^2 - 14x + 33 = 0
D = 196 - 132 = 64 ; V 64 = 8
X1 = ( 14 + 8 ) : 2 = 11 ( > - 1,5 )
X2 = ( 14 - 8 ) : 2 = 3 ( > - 1,5 )
Ответ 11 ; 3