Mathematics
Junior High
Resolved

答えを教えてほしいです🙇‍♀️

p20

20 練習 次の式を因数分解せよ。 19 (1)x2-yz+zx-y2 (2) 9b-9-3ab+a2 (3)_2x2+6xy+x-3y-1

Answers

Were you able to resolve your confusion?