Question

Factor completely: 6x^4y^3 + 21x^3y^2 − 9x^2y
3xy(2x^3y^2 + 7xy − 3x)
3x^2y(2x^2y^2 + 7xy − 3)
3x^2y^3(2x^2 + 7xy − 3)
3x^2y(2x^2y + 7xy − 3y)

Answer 1

\[3x^2y\] comes out
what stays in?

Answer 2

the largest common factor is 3x^2y

Answer 3

check which one works by multiplication
my guess is the second one