1.
a, 24x^3 y^7 z^2 : 16x^2 y^3 z
b, (8x^3 y^3 z^5 - 20x^3 y^4 z^2 + 18x^5 y^3 z^4):12x^3 y^2 z^2
2. 6x^2 y^3 - 3x^4 y^2 + 12xy^3
3. 49x^2 - 1/4y^2
4. 25-4x^2-4x-1
Loga
Sinh Học lớp 12
