Question

Factor completely. m4 - n4

(m^2 + n^2)(m - n)^2
(m^2 - n^2)(m + n)(m - n)
(m^2 + n^2)(m + n)(m - n)

Answer 1

(m⁴-n⁴)

(m²+n²)(m²-n²)

(m²+n²)(m+n)(m-n)

3) (m²+n²)(m+n)(m-n) is the right answer.