Tính các đa thức sau
Tính các đa thức sau
a) 7x^2(x^2-5x+2)-5x(x^3-7x^2+3x)
b) x^3(x+2)-x(x^3+8)-2x(x^2-4)
c) 2x(3x^3-x)-4x^2(x-X^2+1)+(x-3x^2)x
d) (-2x^2)(5x^3-4x^2-7x+1/2)
e) (4x^3-5x^2+2x-2)(-1/2x^2)
g) 3x(12x-4)-9x(4x-3)
m) x(5-2x)+2x(x-1)
n) (3x^4-1/2x^3+1/5x^2-1) (-6x^2)
i) (12x-5)4x-(3x-7) 16x
k) (x^3+2x^2-1) 1/2x-x^2 (x-1)
a) 7x^2(x^2-5x+2)-5x(x^3-7x^2+3x)
b) x^3(x+2)-x(x^3+8)-2x(x^2-4)
c) 2x(3x^3-x)-4x^2(x-X^2+1)+(x-3x^2)x
d) (-2x^2)(5x^3-4x^2-7x+1/2)
e) (4x^3-5x^2+2x-2)(-1/2x^2)
g) 3x(12x-4)-9x(4x-3)
m) x(5-2x)+2x(x-1)
n) (3x^4-1/2x^3+1/5x^2-1) (-6x^2)
i) (12x-5)4x-(3x-7) 16x
k) (x^3+2x^2-1) 1/2x-x^2 (x-1)