Question

m⁴n⁴-1=(mn + 1) ( - + - )​

Answer 1

Explicación:

${m}^{4} {n}^{4} - 1 = ( {m}^{2} {n}^{2} + 1)( {m}^{2} {n}^{2} - 1) \\ ( {m}^{2} {n}^{2} + 1)(mn + 1)(mn - 1)$