Question

3x-2корень x-8=0 помогите плиз

 

Answer 1

3x-2$3x-2sqrt{x}-8=0, sqrt{x}=y, y>0, 3y^{2}-2y-8=0, D=100, y_{1}=2, y_{2}=-frac{4}{3}, sqrt{y}=2, y=4$

Answer 2

3x2 - 2x - 8 = 0
D = b2 - 4ac
D = 4 + 96 = 100 = 10

x1,2 = -b ± √D
x1 = 2 + 10/6= 12/6= 2
x2 = 2 - 10/6 = - 8/6= - 4/3
Ответ: x1 = 2 ; x2 = - 4/3