Объяснение:
7) (b^2-c)^2
8) (m^4+1/2n^2)^2
9) (6ab-1)^2
10) (x^2+1)^2
11) (1/4 x^2-4y^3)^2
12) (0.1a^4-5b^7)
9)(2-3d³) (2+3d³)=4-9d^6
(12z²-7a*)(12z²-7a*)=(12z²-7a)^2
