Question

решите уравнение:

(3x + 4)² = 4(x + 3)​

Answer 1

Ответ: -2 , -2/9

(3x + 4)² = 4(x + 3)​

9x^2 + 16 + 24x = 4x + 12

9x^2+16-12+24x-4x=0

9x^2+20x+4=0

D^2 = 400-144= 256

D= 16

x1=-20-16/18=-36/18=-2

x2=-20+16/18=-4/18=-2/9