Срочно умоляю(3х+5) (3х-5) - (3x-1)²

Question

Срочно умоляю


(3х+5) (3х-5) - (3x-1)²

Answer 1

= 9х²-25-9х²+6х-1=6х-26=2(3х-13)

Answer 2

(3х+5)·(3х-5)-(3х-1)²=9х²-25-(9х²-6х+1)=6х-26=2(3х-13)