Question

Разложите на множетели
ac^4-c^4-ac^2+c^2
4-m^2+2mn-n^2

Answer 1

$ac ^{4} - c ^{4} - ac ^{2} + c^{2} = \\ = c ^{2} \times (a - 1) \times (c - 1) \times (c + 1)$

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