Which of the following polynomial equations are valid identities?
A. m3−1=(m−1)(1+m+m2)

B. (n+3)2+2n=8n+13

only A

both A and B

neither A nor B

only B

the answer is a if my teacher taught me correct

this excerpt is taken from the book “we shall not be moved : the women’s factory strike of 1909 “ and is written by joan dash. it is the story of the great strike when almost 30thousand women working in factories in america formed a union to fight unsafe working conditions, long working hours and miserable wages.

question: which best states the author’s purpose for including this information in the text?

answer: to challenge the reader’s ideas about a historical event

i think it’s a i believe