Làm tính nhân :
a) \(\left(x+3y\right)\left(x^2-2xy+y\right)\)
b) \(\left(x^2-1\right)\left(x^2+2x\right)\)
c) \(\left(2x-1\right)\left(3x+2\right)\left(3-x\right)\)
d)\(\left(x+2\right)\left(x-1\right)\)
e) \(x\left(x-y\right)-y\left(y-x\right)\)
Loga
Toán lớp 8
