Question

разложить на множители    18-2m^2

                                                    c^3d-cd^3

Answer 1

$18-2m^2 = 2(9-m^2) = 2 (3-m)(3+m)$

$c^3d-cd^3 = cd (c^2-d^2)= cd (c-d)(c+d)$