# Find HCF from m^3 - 8n^3, 2m^2 - 5mn + 2n^2, and 2m^2 - 8n^2

Hello friend, I’ve done few steps for 1st expression, but I can’t solve any further. Can u pls help?

1st expression:

= m^{3} - 8n^{3}

= m^{3} - (2n)^{3}

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

= (m - 2n)... ??