Question

Решить уравнение (5х +1) 2 - (5х +1)(5х-1) =0

Answer 1

$(5x +1)^2 - (5x +1)(5x-1) = 0 \\\\ (5x +1)*(5x +1) - (5x +1)(5x-1) = 0 \\\\ (5x +1)((5x +1) - (5x-1))=0 \\\\ \\ 5x+1=0\\ x=- \frac{1}{5}\\\\ (5x +1) - (5x-1)=0\\ 5x +1 - 5x + 1=0\\ 2\neq0$

Ответ: $- \frac{1}{5}$