4) 2ах + 3ах = 5ах, - х^2 + 2х^2 = х^25) 4mn - 2mn = 2mn, - n^2 + m^2 = m^2 - n^26) 8px + 4p^2 = 8px + 4p^2, - x^2 + p^2 = p^2 - x^2
4) 2ах + 3ах = 5ах, - х^2 + 2х^2 = х^2
5) 4mn - 2mn = 2mn, - n^2 + m^2 = m^2 - n^2
6) 8px + 4p^2 = 8px + 4p^2, - x^2 + p^2 = p^2 - x^2