Сократите дробь 9x2-1 _______ 1-6x+9x

Question

Сократите дробь 9x2-1

_______

1-6x+9x

Answer 1

 9x2-1

 _______=(3х-1)(3х+1)/(1+3х)=3х-1

1-6x+9x

Answer 2

(9x^2-1)/(1-6x+9x)=(9x^2-1)/(1+3x)=3x-1+0/(3x+1)=3x-1