Question

Найдите корень уравнение:
1)(6х-1)(6х+1)-4х(9х+2)=-1
2)(8-9а)а=-40+(6-3а)(6+3а)

Answer 1

36x^2-1-36x^2-8x+1=0
-8x=0
8a-9a^2=-40+36-9a^2
8a-9a^2+9a^=-40+36
8a=-4
a=-0,5