Question

решите уравнение (4+9в)^2+(9в+2)(2-9в)=0​

Answer 1

(4а+9b)²+(2+9b)*(2-9b)=0

16a²+72ab+81b²+4-81b²=0

16a²+72ab+4=0   :4

4a²+18ab+1=0

18ab=-1-4a²

b=(-1-4a²)/18a

Answer 2

(4+9в)²+(9в+2)(2-9в)=0
16+72в+81в²+4-81в²=0
72в+20=0
72в=-20
в=-20:72
в=-5/18
Ответ:-5/18