Question

Помогите плиз!!!!

x+корень 2x+3=6

Answer 1

x + √(2x+3) = 6

(√(2x+3))^2 = (6-x)^2

2x + 3 = 36 - 12x + x^2

- x^2 + 14x - 33 = 0

D = 196 - 132 = 64

x1 = (-14 + 8)/-2 = 3

x2 = (- 14 - 8)/ -2= 11