Question

Jamar is factoring 90x - 15. Find his mistake and correct it.

Answer 1

Jamar's mistake: 90x - 15 = (9x - 15)(10x + 1)

Correct answer: 90x - 15 = (9x - 5)(10x + 1)

Answer 2

both answers are wrong:

90x - 15
= 15(6x - 1)