1) (ab-4)(a/2b/2+4ab+16) = ab a/2b/2 + ab 4ab + ab 16 - 4 a/2b/2 - 4 4ab - 4 16= a^2/4 + 4a^2b + 16ab - 2a - 16b - 64
2) (3x+yz)(9x/2-3xyz+y/2z/2) = 3x 9x/2 + 3x (-3xyz) + 3x y/2z/2 + yz 9x/2 + yz (-3xyz) + yz y/2z/2= 27x^2/2 - 9x^2yz + 3/2xy - 3xyz^2 + y^2/2 - yz/2
1) (ab-4)(a/2b/2+4ab+16) = ab a/2b/2 + ab 4ab + ab 16 - 4 a/2b/2 - 4 4ab - 4 16
= a^2/4 + 4a^2b + 16ab - 2a - 16b - 64
2) (3x+yz)(9x/2-3xyz+y/2z/2) = 3x 9x/2 + 3x (-3xyz) + 3x y/2z/2 + yz 9x/2 + yz (-3xyz) + yz y/2z/2
= 27x^2/2 - 9x^2yz + 3/2xy - 3xyz^2 + y^2/2 - yz/2