Question

решитьуравнение 9х(х-2)-(3х+5)^ 2 =1

Answer 1

9x^2 - 18x - (9x^2 + 30x + 25) - 1 = 0
9x^2 - 18x - 9x^2 - 30x - 26 = 0
- 18x - 30x - 26 = 0
- 48x - 26 = 0
- 48x = 26
48x = - 26
x = - 26/48
x = - 13/24