tìm số tự nhiên n để A(x) chia hết cho B(x):
A(x)=3x^n-1.y^6-5x^n+1
B(x)=2x^3.y^n

turn these sentences into passive voice: 1 she has to prepare the lesson before going to school

rút gọn biểu thức:(8x^3-4x^2):4x-(4x^2-5x):(2x)+(2x)^2

(3x^3-x^2y):x^2-(xy^2+x^2y):(xy)+2x(x-1)

làm phép chia
4x^2(y+z)^5:2x(y+z)^3
-x^2(y-1)^3(z+2)^2:1/2x^2(y-1)^2
x^m+1(y+2)^m:y(y+2)
3/4(x+2)^2m(x-3)^n-2:2/3(x+2)(x-3)^2

tìm giá trị lớn nhất :

7-11x-x^2

7x-5x^2+8

8x-7x^2+15