Решите неравенство (x-5)^2/x^2+6x-7 меньше или равно 0

Заменим частное произведением:
(x - 5)²(x + 7)(x - 1) ≤ 0
               +                            -                             +                        +
_______________₀_______________₀__________________________
                            - 7                                    1                   5
                              //////////////////////////////
x ∈ (- 7 ; 1)