a, 3x(x + 1) - 5y(x + 1)
b, 3x(x - 6) - 2(x - 6)
c, 4y(x - 1) - (1 - x)
d, (x - 3)^3 + 3 - x
e, 7x(x - y) - (y - x)
h, 3x^3(2y - 3z) - 15x(2y - 3z)^2
k, 3x(z + 2) + 5(-x-2)
l, 18x^2(3 + x) + 3(x + 3)
Loga
Sinh Học lớp 12
