Question

Решите уравнение :  (6а-1) (6а+1) - 4а ( 9а+2) = -1

Answer 1

$(6a-1) cdot (6a+1)-4a cdot (9a+2)=-1; \36a^{2}-1-36a^{2}-8a=-1; \ -8a=-1+1; \ -8a=0; \ a=0$